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Convert one column to multiple columns in r. Convert single column variable into multiple columns.


Convert one column to multiple columns in r ; Use ggplot2 to plot using the variable as aes color/group. I think people may say it's "wrong" because dplyr::mutate() on its and I would like to perform log2 transform on column 2:6 but keep the information of column one. And changing same text Please help Thanks. As you can see data frame now has a vector instead of single text value. R multi-hot encoding among multiple columns. By default, tab is the delimiter. How to make a column into column names in R. Using only base R, you could use sprintf() to put the two columns together, adding a zero wherever necessary on the month column Be prepared for a lot of typing :) Oracle has UNPIVOT functionality but it wants at least two columns in the result, so it won't work for your situation. txt output: tom bart jack foo kim bar Command: convert one column file into two columns with , as a delimiter I can do it for one column, or the other, but I cannot figure out how to do it for both. E. converting to date format in dataframe in R. Performing transformation for multiple columns in one go in R. Viewed 1k times Part of R Language Collective 1 . I have a table1 with some columns name Phone No. table in R. I have a bunch of columns so I don't want to do it one by one. Transpose every N rows to new column. One way is, data. 1086. I would like to do this in a data. Connect and share knowledge within a single location that is Learn more about Labs. Convert factor to logical in one step. What you do need to know is how many new columns Parts will be split into with seperate. You may notice that the column of names is "out of order" (one, The dataset consists of two columns (as above) but 77,000 rows. frame(t(MyVect)). I was using with the command. R: Convert factor column to multiple boolean columns. I want to convert this one column to multiple columns, one for each unique element across the lists (in this case, genres), and have them as binary columns. As I have to address the columns dynamically as well as a second input, I wasn't able to find an answer. frame and a data. frame How to combine and convert multiple rows into one column? I have been searching but can't find a suitable solution for my question. How to reformat an R data frame with multiple rows into one row. You might create a function that takes a df, a column to be expanded and a separator for that column, and chain calls as many times as needed. numeric(), we converted its type to numeric. I have a dataframe df in R: Time series - Convert every column of dataframe to time series. I have a data frame which consists of a single column of some very messy JSON data. Hot Network Questions Help with simple transimpedance amplifier circuit here some hints since you don't provide a reproducible example , neither you show what you have tried : Use list. Separating a List into Converting multiple boolean columns to single factor column. Date function to change them from character to date. An example table: df <- data. Ask Question Asked 11 years, 6 months ago. Viewed 3k times and I would like the values in the "Name" column to turn into their own columns with The data. Please help with the following. You still will need to name the columns accordingly. x[per_col] <- as. If you utilize transform function, with hablar::convert. paste0 is just used in order to create the column names, it is not used on the values. If some of the rows have missing components add , extra = "merge" I have a data frame that contains about a 100 columns called some_text_microorganism_growth. It is a base function, so we don’t need to load an external package. transform data from rows to column in R. df <- data. 3, Phone No. Can I use gsub() The function uses the na. 3: change multiple character columns to date df_column_object <- aframe[,2] simple_column <- df_column_object[[1]] All the solutions suggested so far require hardcoding column titles. I'm a bit of an R novice, so any help would be greatly appreciated! R matrices are in column major order, so you can easily concatenate them into a single column vector with the matrix function. I am trying to convert a column that has categorical data ('A', 'B', or 'C') to 3 columns where 1,0,0 would be 'A'; 0,1,0 would represent 'B', etc. 4. Convert column to date in R. frame called dat: . A data to play with: df <- diamonds %>% slice(1:3) %>% select (5:10) NB: I know how to do it in data. Problems with a binary one-hot (one-of-K) coding in python. numeric() function. DataFrame Name: SprintTotalHours. 31. data %>% mutate(x=ifelse(x=="Yes", 1,0)) but i have to go through each column at a time, and i was wondering if there was any way i could do it all at once. lapply is probably a better choice than apply here, as apply first coerces your data. How to convert different date formats to single format in multiple columns of dataframe. I have a dataframe such as : Groups COL1 G1 1 G2 3 G3 5 G1 Transpose multiple columns to rows in R [duplicate] Ask Question Asked 8 years, 10 months ago. The raw data looks like so: convert multiple columns to one column but multiple rows in SQL. I have 7 columns in my dataset. Ask Question Asked 4 years, 11 months ago. I would like to convert this column into binary columns for each breed (1 dog is breed, 0 dog is not that breed) Connect and share knowledge within a single location that is structured and easy to search. – A5C1D2H2I1M1N2O1R2T1. Now all three columns are combined into a 2 column data frame with 30 rows. The first column is the 'name' vector and the second the value. R - How to one hot encoding a single column while keep other columns still? Ask Question Asked 6 years, How to convert a data frame to one hot encoded. table; cols=1:5 dt[ , (cols):=lapply(. frame(ID=sample(c(1000:1004),size=20,replace=T), Fruit=sample(c Transform unique values of a column into multiple columns containing their corresponding values in Convert multiple binary columns to single categorical column [duplicate] Ask Question Asked 9 years, 10 months ago. quantile(x1, x2, x3, x4, x5, x6 , x7, x8, probs = 0. About This is from @Onyambu using base R. Note that I don't necessarily want to change every column. R - convert datatype of all columns in a dataframe from character to numeric dynamically. Commented Jan 29, 2018 at 11:45. The answers to the following question almost do what I want, but in my case a row can have more than one positive outcome (e. separate has a default regex to split on non character/numeric values, thus you don't need to specify your condition. How can i change multiple columns using the same condition in R? 1. Viewed 2k times Part of R Language Collective Combining rows into one row with multiple columns of data R. frame(apply(df,2,function(x) gsub(y,z,x))) #y is what you want to replace #z is the replacement #This uses regex df } my_replacer(sam,"Emerging. A has 1, 2 which represent 2 different weights. For example, if you would do some modifications before the mutate, Z may have changed and the result will therefore be incorrect. Ask Question Asked 7 years, 6 months ago. I am trying to create a barplot in R that displays data from 2 columns that are grouped by a third column. In example code, It have just 4 column but my data have over 10 column, and I want change 6~7 specific column (not continuous). Improve this Split data frame string column into multiple columns. 2, Phone No. a-j) and columns b and g are the columns that are currently numeric and that I want to set to factors. By adding !! in front ofrowSums you convert all values from the rowSums-call higher than zero to TRUE and all eros to FALSE. The "file" column is separated into 3 separate columns where there is no longer an "r" or ". 5,16. Ask Question Asked 3 years, 3 months ago. I did not want to write out a separate line to convert each column to date in R, as this is something I will have to do quite often in this dataset, so I wrote out this loop, to change the date type. This way you have the appropriate number of columns to seperate Parts into by your I have a question about how to convert multiple columns to a vector. Viewed 4k times 1 . Modified 3 years, 3 months ago. Now I would like to have a table with a column of We don't need multiple calls if we specify the names_to as a vector of values i. make values in am as column variables ; (order) data frame rows by multiple columns. table is avoided. This makes them non-generic (imagine applying this to function arguments). What I want is to use lapply (or another*apply function) and as. to get expected out put in the target table . I have a list of dataframes, each df having three columns all of which are of type character. I ran into an unexpected problem when trying to convert multiple columns of a data table into factor columns. Using this, you could do: numeric_cols <- sapply Convert multiple columns of a data frame from string to It will indeed convert the numbers if one of the two columns is not numeric. You do not need to know the number of unique values with this code -- the pivots take care of that. frame(A=1:10, B=2:11, Convert multiple columns from numeric to factor. B) have it so that anyone who reported multiple columns gets designated "multiple". Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company R Transformation of column values within dataframe. There would be blank cells for rows which had no column. , black would be 1, white would be 2, etc. NO Brand Brandval Change Revenue Cost Industry 99 Hershey $6. g. , dates remain dates, strings remain strings). data. paste - - < input. table(df) # You still have to define your subsets of columns you Connect and share knowledge within a single location that is structured and easy to search. value - returns the value of the columns and 'group' the column with the suffix of column names. library (dplyr) df %>% across() makes it easy to apply the same transformation to multiple columns, allowing you to use select() semantics inside in "data-masking" functions like summarise() and mutate(). Connect and share knowledge within a single location that is structured and easy (ind[,. That's easy to do by counting the number of delimiters and adding one with str_count. On the LHS of the equation are the column names, on the RHS is the split + transpose operation on the column. Convert Multiple Columns to Numeric; Convert One Column to a Numeric. – Dan. Replacing characters in several columns. Improve We can use lapply instead of apply as lapply keeps the same structure of the columns while apply will convert to a matrix and matrix can have only a single class. 7 B $562M Consumer Packaged goods 100 Costco $6. I can do it with either of these methods, but they feel clumsy. Using . dplyr::mutate() just makes a new column. 1. With only one value column, all colnames of the wide data set would go into one long column with the name given in names_to. What would be the best technique to convert such columns to multiple columns of a dataframe in Pandas? I want to pass columns inside the is. 2: convert multiple columns to dates with lubridate and dplyr. For multiple value columns, names_to may receive multiple new names. I have a dataframe with 1000 IDs and their values. Columns with data: OriginalEstimate,TimeSpent,Sprint 178,471. converting rows into a single column. one hot encode each column in a Int matrix in R. Learn more about Labs. A second column would be created for only those cells which had a comma in the them. Based on your comments, I feel that I need to modify my answer to make it more pipe-friendly. Is there any simple way to accomplish this without using loops and value by value assignments ? Convert a matrix to columns. The libraries I am using are dplyr and tidyverse. Using the transform() function, you can modify a single column or multiple columns. CREATE TABLE XX_ITEM_PRODUCT 1) Highlight "Value" column and under the Transform toolbar click "Unpivot Columns" 2) Go to Add Column tool bar - click "Index Column" (this will add an index column to your dataset. 915. 3 rd and 4 th column are factor, and the last one is "purely" numeric. To convert a single column to numeric type, we can utilize the as. Split categorical values of one column into more columns. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You can use the following methods to convert multiple columns to numeric using the dplyr package: Method 1: Convert Specific Columns to Numeric. Mapping multiple columns in R including a single column containing comma-separated values. works on vectors, and transforms df[,2:10] to a vector. 3B - Retail I was trying as. numeric) We can see that every column in the data frame is currently a character. I have result like below: level_1_node level_2_node level_3_node level_4_node Node 1 Node2 Node 3 Node 4 I want to convert it to: Node Node 1 Node I have a single column of data in SQL Sever and need to expand this to multiple (2) columns. character_vars <- lapply(dat, class) == "character" dat[, character_vars] <- lapply(dat[, character_vars], as. split(sep) d = {c: df[c]. Scoped verbs (_if, _at, _all) have been superseded by the use of pick() or across() in an existing verb. table) setDT(df1) for(j in names(df1)[-1]){ set(df1, i= I am trying to convert multiple columns from "character" to date, but also reformat the date. Commented Dec 12, 2013 at 6:35. This is easiest if all column names follow a specific pattern like Start_1, End_1, Start_2, etc. Ask Question Asked 9 years, 10 months ago. Help? I have a dataset in R with many observations and one column with rows which look like this: [{'name': 'example1', 'parameters': ['par1', 'par2', 'par3'], 'values': Convert dictionary column to multiple columns in R. How to add multiple Windows 11 users that have umlauts (Ä, Ö, Å, How it works. Convert multiple columns into a single column I am trying to combine multiple columns into a vector (ideally I would like to specify which columns using some regex or dplyr::contains(). Just like Expected Outcome Thanks. Modified 8 years, 10 months ago. matrix(DF) xtabs( ~ name+work, data=DF) You do not need to do the conversion to a matrix to get xtabs to work and, as always in R, these values will print out at the console but 'DF' remains unchanged unless you assign (<-) the values to 'DF'. We could use values_transform to convert to character type (as character and then modify if needed. . Split a single column into a multiple columns dataframe. matrix and xtabs. numeric to convert the 'heart attack' Transpose a single column to multiple columns with formulas. with item_number combination, Products starts with 0 goes to Product 0 column,product start with 3 goes to product 3 and product start with 5 goes to product 5. Hot Network Questions I have a single column in length of R*N, I want to convert it a RxN matrix in R. table(x=c("A/B", "A", "B"), y=1:3) DT How to convert multiple columns in a list separately in R. To easily convert multiple columns to different data types you can use hablar::convert. repeat(r. This question already has Need to transform it to following format so each ID has one row: I have recoded each column using the recode command so that different numbers represent different ethnicities (i. My end goal is to recode the 1:2 to 0:1 in 'a' and 'b' while keeping 'c' the way it is, since it is not a logical variable. Convert single column variable into multiple columns. Or if there is a way to convert this data (manually converting is not an options because it is a huge file with a lot of rows) into a R and ggplot compatible data format. Split data frame string column into multiple columns. How to convert multiple columns to individual rows in R. na argument but that obviously wouldn't work. ; Cons. 5. 6. All solutions/examples I checked online had similar data put into a three column layout. The problem is the dataframe jd1 has only one column. Ask Question Asked 6 years, 9 You can use paste command in UNIX for converting the file into multiple columns. In the form it asks for information on a household and asks for their age(AGE) and gender(SEX) for each member, allowing up to 5 people per household. The post Convert multiple columns into a single column-tidyr Part4 appeared first on Data Science Tutorials. Share. ) to try and make a single ethnicity variable. I tried to do that with tidyr::separate but it internally uses stringi::stri_split_regex which doesn't accept an empty string as a separator (although the sep argument should take a regex). library (dplyr) df %>% mutate_at(c(' col1 ', ' col2 '), as. This was necessary for getting the column names right when using the . How to set these specific columns as factors rather than doing as. 6. The result will be a vector with the distinct elements. How to group comma-separated variables in the same column? 0. I would like to convert that column into multiple columns with binary presence/absence values for each of the unique character strings in the original column. I need to convert many columns that are numeric to factor type. Edit : I have a text file that has one colunm of 1800 entries that are actually two sets of data (size,age) that have been combined. library(data. 1045. ) B) have it so that anyone who reported multiple columns gets designated "multiple". Got really repetitive real quick. See vignette("colwise") for details. Basically, suppose I have 10 columns (i. frame but it gives me results in one single column while I want to split it into 7 columns as explained above. grep() The function quantile only expect one input vector. Convert Boolean indicator columns to a single factor column. Example df Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I don't believe it is that straightforward to adapt this answer highlighted by @wen to this question, so I'll propose a solution. 5, Phone No. I have data frame mydf: Since R data frames (and tibbles) are implemented as lists of column vectors with equal lengths, the unlist function will effectively convert a data frame into a vector. frame. I used cast function from reshape package but it seems to convert only one column into row. In fact, they are the coordinates and area of a figure in a plan. def expand(df, col, sep=','): r = df[col]. In R, how can I change many select (binary) In the next step I would like to do this with multiple columns and place the resulting tables beneath each other. Convert multiple row value in to multiple column in SQL Server. I used the following command to convert one of the columns to numeric format: df$ Connect and share knowledge within a single location that is structured and easy to search. csv" and the first two numbers (ie 100 and 0. I've tried different transpose formulas and keep getting formula errors or I want to move the values in the "values" column to new columns where they have the same "key". merge multiple TRUE/FALSE columns into one. A) create a single column from the multiple columns combined. Convert dataframe to matrix? My dataframe has 4 dates columns, but when I load the file from Excel to R, all the date columns become numeric. frame to factors after you've already loaded your data, you can do it like this, to a data. I am able to log transform column 2:6 with log(d[2:6],2) but then I lose the gene information. Reshaping a data frame --- changing rows to columns. Modified 3 years ago. It's also kind of like this question, but again, I don't think I want the columns to vary with a row value as in that answer. select column Connect and share knowledge within a single location that is structured and easy to search. It should be faster as the overhead of [. To split a column into multiple columns in the R Language, we use the separator() function of the dplyr package library. Converting multiple boolean columns to single factor column. character So that empty columns can be populated with null. if you have your data as dataframe, you can just do . 7 B 7% $4. Here is an image showing what I want to achieve: This is R code which will produce the data frame with combined factors that I want to convert into several boolean columns: You can see from the above figure that “COL2” is a type of character, and after applying a transform() and as. Instead of reshaping the data twice, I add the prefix "values" to the columns named "BP", "HS", and "BB" using rename_with. 3. table: How do I convert column classes? Connect and share knowledge within a single location that is structured and easy to search. Converting data objects in R. convert(df, as. We convert the 'data. Change values of multiple columns based on the value of one column in data. I would like to split the keywords into multiple columns and eventually convert them to binary data, like this: person k f p w y j r g w u x c n 1 person_1 1 1 1 1 0 0 0 0 0 0 0 0 0 2 person_2 0 0 0 0 1 1 0 0 0 0 0 0 0 3 person_3 0 0 0 0 1 0 1 0 0 0 0 0 0 4 person_4 0 0 0 0 0 0 0 1 1 0 0 0 0 5 person_5 0 0 0 0 0 0 0 0 0 1 1 1 1 I'd like to add an alternative tidyverse solution drawing from the answer provided by @Dave2e. cols=1:5) columns at once (in one line) to another type (lets say integer), using dplyr. , black would be 1, white would be 2 etc. 2. Example: LOGRECNO STATE COUNTY TRACT BLOCK 60 01 001 021100 1053 61 01 001 . I am trying to move data from one column to another, due to the underlying forms being filled out incorrectly. Viewed 640 times I would like to convert each of the columns (of which there are In base R, we may either use one of the following i. The scoped variants of mutate() and transmute() make it easy to apply the same If you want to split one data frame column into multiple in R, then here is how to do that in 3 different ways. Converting rows into columns and columns into rows using R. numeric(gsub("%","", unlist(x[per_col]))) How can I use gsub in multiple specific column in r. To change the delimiter, use -d option. Convert one column into multiple columns. library position, and starter columns are characters while the points column is numeric. Change column values when specific condition is satisfied. DT = data. starts_with does the same but is much slower. B has 1, 2, 3 which represent 3 different times. Learn more about Teams Elegantly assigning multiple columns in data. 573. You can also just use the dummy() function to apply this to just one column. 1) remain in one column- although this could be further separated into two columns if easier (ie the 1 and 1 in the "dom" column could be in If i were to use text-to-columns out of V1 in excel, I would end up with 3 columns split on the comma. We can unlist per_col columns, remove "%" symbol and convert it into numeric. I want to turn it into something like below. Command: convert one column file into two columns. To get to this answer one needs to know that a dataframe is a list and needs a bit of @Alec data. R - change values in multiple selected rows based on I want to convert this data into multiple columns with binary (zeros and ones Connect and share knowledge within a single location that is structured and Learn more about Labs. Turning a vector into a matrix. Viewed 1k times Part of R Language Convert data. Screenshot attached for an example of the current state and wanted output. frame column format from character to factor. It is possible that a single column/multiple columns are character class. Or, a valid answer to this question is to convince me it's exactly like one of the I want to convert it to data frame as below: S. SDcols=ind] This selects columns which are specifically character based and then converts Convert a categorical column in so many columns as Surprised this one isn't upvoted more. The separate() function separates a character column You can use the following methods to convert multiple columns to factor using functions from the dplyr package: Method 1: Convert Specific Columns to Factor library (dplyr) You can use the following methods to convert multiple columns to numeric using the dplyr package: Method 1: Convert Specific Columns to Numeric. I want to change the class of multiple columns in an R data frame without either doing it one by one, or using a for loop (and noting this answer). R Convert all values of multiple dataframe rows to one vector in order. Here's the stack approach: This is very similar to melt from "reshape2": And, very similar to @TylerRinker's answer, but not dropping the "times", is to just use sep = "" to help R guess In this article, I have explained multiple approaches to split a single column in an R DataFrame into multiple columns by using base R functions like the strsplit() and the do. Alternatively, you could, of course read the column names from the column first and then insert them in the code in the other solutions. loop over all the columns, Convert a character column in a dataframe into a numeric column in R. Depending on your context, this could have unintended consequences. Reshaping from long to wide format with multiple value/measure columns is now possible with the new function pivot_wider() introduced in tidyr 1. Writing a Function to Change Certain Columns to Lowercase. R: Transforming variables over many columns. I want to use gsub function specific column in data. Also, I would like the resulting column to be a character column. Therefore, I renamed the columns in the first step. seed(74. Here, we use names_sep as . strings argument in type. DataFrame Convert column or Pivoting Column into a new row. Here's a step-by-step process: First, ensure that the column is in a convertible format. I need to have 5 columns on each row. table offers tstrsplit function to split a column into multiple columns. Viewed 11k times 2 . files to go through all your documents; Use lapply to loop over the result of the previous step and read your data; Put your data in the long format using melt from reshape2 and the variable time as id. I know I can use as. Replace certain values across multiple columns, before column values change, Convert a column in R data frame to lower case. frame' to 'data. Some of them are single "events", and some of them are a combination of "events". Merge multiple mutually exclusive factor columns into a single column. Here's a simple function: my_replacer<-function(df,y,z){ df<-as. The pattern is: df[cols] <- lapply(df[cols], FUN) The 'cols' vector can be variable names or indices. Factors in many columns to boolean convert. grepl subsets Z to get only the columns needed. All of the other solutions run out of memory. I have the following dataset that I would like to group them by their condition and take all the position count into one vector. factor() and adding them to my existing dataframe (my dataframe for this example is dataInExample)?. 12. If it's a factor or character, conversion to numeric requires an intermediate step. One of the columns includes more than 1000 unique character strings (different agricultural practices). I am fairly new to R, and trying to determine the best way to loop through these variables and recode them. How can I simply convert the string without getting the text . I'm doing like these how to convert all datetimes in a dataframe column into a particular datetime format in R (when the csv file has stored them in different formats) 0. Use as. Convert a single column to a range of data from row to row: In excel, the OFFSET function can help you, you can use this formula as following steps: 1. For this reason, I'll create a character vector for the new column. Jason How to convert multiple columns to individual rows in R. frame to date. What would be better way to convert two columns into single row based on ID. Some solutions to different operations that are not applicable to this case: 1: convert column in data. e. Commented Aug 30, 2013 at 6:41. R identifies those as strings. Ask Question Asked 4 years, 9 months ago. For loop to convert multiple columns to factors in R. 5) you're feeding it 8 input vectors, and it will only use x1 and ignore x2 to x8. Learn more about Teams Get early access and see previews of new features. Reformatting dates That's quite right. As they are coded numerical values, R will treat them as numerical variables. Pivoting one dataframe column with associated values to create multiple columns. Which could be achieved in different ways. Skip to main content. 3 The question is the function works fine for single column with apply, but returns wrong values when used with multiple columns with apply. 0. Changing multiple columns with set in data. I would like to convert the JSON entries in that column to additional columns in the same data frame, I have a messy solution, but it will be tedious and long to apply it to my actual dataset. convert to do the conversion to NA. Andrew Haynes Convert multiple binary columns into factors with names based on column name in R elegantly with dplyr. I had thought there would be done with mutate_if or mutate_each in dplyr but I I have a problem using data. 7. table: dt <- df %>% data. See vignette("colwise") for more details. To convert just the team and position columns to factors, we can use the following It would be better to do this with type. is. Anyways, I am NOT looking to concatenate columns or a solution using paste (I want to be able to use an %in% statement on the resulting vector. Modified 4 years, 8 months ago. 7B 14% $117. table vs dplyr: can one do something well the other Is it possible to split a column containing vectors with 3 elements into 3 seperate columns inside of a dataframe?? One column containing ("aa","bb","cc"), you wish to convert into columns then you could use data. Convert column to comma separated in R. data. Like Dave2e's solution it's a two-step procedure (first rename, then reshape). If you want to keep the original column you can add , remove = FALSE and convert = TRUE if you want to set corresponding classes to the new columns. grepl across multiple columns in R. Here is an option using set from data. Modified 11 years, 6 months ago. Complicated dataframe transformation with moving multiple columns into one. ). len(), axis=0) for Given a (pre-existing) data frame that has columns of various types, what is the simplest way to convert all its character columns to factors, without affecting any columns of other types? Here's an How to convert multiple columns to one column in Oracle. table with lapply() 27. Convert multiple rows into single column in R. Reshape one column to multiple columns in R. R tries to find the common denominator and will convert everything to it (most likely in your case character). @jdcode If you are still wondering, it's not that one is right and one is wrong, they simply do different things. pivot_wider() (counterpart: pivot_longer()) Hi I have a dataset with multiple columns that are populated with either NA or "Y". From something like this: Convert data with one column and multiple rows into multi column multi row data. I want to specify the columns by name, and then apply the as. Rotate Row Cell Values to a Single Column in R. convert from base R which automatically correct the type based on the value in each column df1 <- type. integer), . I am working with Census data and I need to combine four character columns into a single column. A) collapse these columns into a single ethnicity variable, with different numbers representing different ethnicities (i. I need to use the factor function to convert these variables into factors. How to automatically transform columns into objects in R? 2. I've reproduced it as follows: if you've just one column or do what you've shown or also use set within a for-loop over each of the columns. train[,(ind):=lapply(. Viewed 8k times Part of R Language Collective -1 . Please kindly help. 23. How to convert a factor column into multiple columns with zeros and ones in r [duplicate] Ask Question Asked 3 years, 5 months ago. Pros. Like this: I have a data frame contain 10 columns of data (temperatures, humidity values etc. 1 210,226,16. Improve this answer. Currently this is how I do it. instead of Z will fix this. Convert multiple columns of a data frame from string to numeric in R. If it is a single column of numeric data, you can easily convert to a matrix and then back to a data frame using byrow = TRUE. CONVERT COLUMN product into multiple columns. Modified 5 years, 6 months ago. to split at the . 3) df<-data. – Arun. Connect and share knowledge within a single location that is structured and easy to search. The first number (row1,column1) is size 1, the second number (row2,column1) is age1, the third column (row3,column1) is size 2, the fourth number (row4,column1) is age2, and so on. call(), If I would like to convert the matrix to 3 columns containing corresponding real name for each pair, Convert matrix to vector by a column to be one. table. Date and time in R. Convert multiple columns into a single column, To combine numerous data frame columns into one column, use the union() function from the tidyr package. How to turn convert one character column into multiple numerical columns in R. Example: If you want to change all character variables in your data. I can do it column by column, but am hoping to write some sort of loop to iterate over all the . 1, Phone No. I found this code online: How to turn categories recorded in a single column into multiple columns for each category. You can query one like this: SELECT LEVEL as Counter FROM DUAL CONNECT BY LEVEL <= 50 dplyr Modify multiple columns based on a single column in a dataframe. Convert matrix to three defined columns in R. I want to convert 4 variables (2 to 5 column) from factor to date format. Convert single row to multiple columns in R. I can do it one column at a time, but I want to know if there is a shortcut through which I can convert all of them together. table' (setDT(df1)), loop through the column names of 'df1' (excluding the 'desc' column'), assign the elements to "NA" where the logical condition is 'i' is met. 478. value I have two R words for you: data. The factor column I want to convert into multiple boolean columns contains 11 factors. Use aggregate(), eg A date typically contains a day, otherwise it's not actually a date. vector() to convert them individually but I Quick question - How to convert all (or some: e. SD, as. factor) This creates a vector identifying which columns are of class This is kind of like this question, but not exactly I think, because I don't want to auto-number columns, just widen multiple columns. table package helps you to retain the column names, and yet subset it by indexing the columns. I do not know how to use the data I have to generate the grouped bar-chart. It's actually a numerical vector converted to character. Related. They are characters but really are an ordered factor (NG<SG<LG<MG<HG) with an equivalent num Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company New to R and trying to figure out the barplot. I would also have the option of treating the new column as a number or text. 3) Highlight the Attribute and Index columns, right click and "Merge Columns" (Pick a I am looking for a way to manipulate multiple columns in a data. I could only find help online for this kind of operation if writing all the header If you just use strsplit it creates a single vector with 2 values in each slot, so tstrsplit transposes it into 2 vectors with a single value in each. 2 240,195,16. This is superior to the previous tidyr strategy of gather() than spread(), because the attributes are no longer dropped (e. numeric function from the Hmisc package does a good job determining whether a given column can be cast to numeric. – User2321. str. If you want to use dplyr::mutate() you have to use paste(), glue::glue(), or strings::str_c() inside the call. When you do . Here is an example of my dataset. First off, you'll need a counter from 1 to 50. ACTUAL TABLE . Stack Overflow. Modified Make one column into multiple columns in R [duplicate] Ask Question Asked 5 years, 9 months ago. How to convert rows into columns using dplyr [duplicate] Ask Question Asked 7 years, 9 months ago. DT<- data. Hot Network Questions. transpose selected column to row in R. frame to an array which means all the columns must have the same type. values. Follow answered Sep 18, 2013 at 13:40. Remove rows with all or some NAs (missing values) in data. Convert single column dataframe to dataframe with multiple rows and named columns. Also similarly with tidyr. Each record would be unique based on Company, Loc, and Type, with multiple Spec rows spread out as columns. I want the new column to be a vector of values, which could be unnested using You can use the following methods to convert multiple columns to factor using functions from the dplyr package: Method 1: Convert Specific Columns to Factor. Here is my sample data frame: I'm looking for a straightforward way to convert all of the variables in a data frame which begin with 'date' to dates using lubridate::dmy() (they are currently characters with the dmy format). I'm relatively new to R and am trying to transpose a date frame of repeating rows into columns in a certain way. Trying How to convert multiple column values to a single column having multiple rows in Postgres. is = TRUE) In dplyr , it can be done with across and specify the range of columns with either numeric index Basically, the first 2 columns are coded. I'm trying to fin a formula that will convert a list several names that are currently in various columns/rows into one single column. eg: please see Example df, how do I convert every rows into column and combine then them into one column, so the new df should have 25 rows with 1 column. Convert multiple character columns to as. How do you make a single column multiple columns in R? Ask Question Asked 4 years, 9 months ago. Ask Question Asked 3 years ago. r; Share. 4, Phone No. From rows to a single column. SDcol=cols] Here is a sample dataframe similar to the one I'm working with: set. Install the package with: library Replace multiple characters with multiple values in multiple columns? R. If you are dealing with a really large data frame and/or a lot of columns this is the only one that will work. R Split column How can I convert certain columns only in a data frame to numeric? For instance, I have this The all. *","2") I am trying to turn multiple columns into one column value DAX/PowerBI. Next to that, sum will give you the total sum, not the sum per column. grep one pattern over multiple columns. Modified 4 years, 9 months ago. I'm looking for an elegant solution, which doesn't involve first finding out how many genres are there, and then creating a column for each, and then checking each list element to then populate the genre columns. . How to convert a >2 column dataframe to 2 columns. df[c(1, 4 How to convert multiple columns to individual rows in R. I understand your question as , subsetting a large dataframe into smaller ones. 8) are in different columns but the last one (ie 1. How to run tapply() on multiple columns of data frame using R? Ask Question Asked 13 years, 5 months ago. Because the change character is SAME! but I want change lots of specific column. 0. table implementation of dcast allows you to convert multiple columns to a wide format without melting it first, as follows: From rows to a single column. I need to transform the data so that the first column has just one value for the identifier and after this, the columns take all the values that the respective identifier has. Group by multiple columns in dplyr, Connect and share knowledge within a single location that is structured and easy to search. Subset for the desired rows and columns with filter and select, then pipe the result through unlist() and then unique(). Coords and areas have always the same length. Hot Network Questions Is it valid to apply equivalent infinitesimal substitutions to evaluate a limit if the resulting limit does not exist? Combine multiple columns into a single column in Postgres. Follow answered Dec 18, 2017 at 15:58. SD[T]]) ### Convert multiple columns to factor bigm. frame easily. Not quite sure what the threshold is but I was processing I need to replace the Yes and No values to 1 and 0 in 200 columns. I want to separate the column sequence into 5 columns (one for each character). Modified 9 years, 10 months ago. dplyr::unite() unites multiple columns together in a new column. R - Convert and transpose data to columns by group [duplicate] Ask Question Asked 6 With these two columns, create a new column for each How can I change the single row to multiple columns in R ? Seems to be a trivial problem but I am stuck on this. Skip to Converting multiple date formats in a column to a single form. It is less flexible than the dplyr::mutate() When I use unlist as demonstrated above, the factors remained as factors unless one of the columns was a character column. What I want is along the lines of spread() in tidyr, but I believe it's slightly different because I can't seem to get it right. first row needs to be "1,2"). I wish to make these values 0 and 1 respectively. R: Converting multiple binary columns into one factor variable whose factors are binary column names. 6 and also table 2 with the columns name Phone No. R dataframe: Time efficient way to transform data. SD,factor),.