data-wrangling

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Check if select columns have the same value
user_177909200
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52
data-wrangling dplyr r
How do I create a column based on values in another column which are the names of variables in my dataframe whose data I want to fill newcol with? R
user_113701670
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700
data-wrangling tidyr dplyr dataframe r
How can I combine several columns into one variable, tacking each onto the end of the other and grouping by values in an ID variable?
user_113701670
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1
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631
data-wrangling dplyr r
Transforming complete age from character to numeric in R
user_130158650
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5
3
370
stringr data-wrangling data-cleaning lubridate r
Pandas - 'returning-a-view-versus-a-copy' error when renaming categorical values at each level by mapping
user_47969420
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3
2
127
data-wrangling pandas dataframe dictionary python
R - Set values by group based on a condition in a dataframe
user_162567710
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3
2
71
data-wrangling r datatable
Convert one column to rows and columns
user_141678460
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2
5
265
data-wrangling pandas transpose r python
Mutate if any column contains a list of values
user_165681590
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2
3
299
data-wrangling multiple-columns r
How to recode values in a column if the value equals the column name, across an entire dataset in R
user_167518250
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3
2
52
reshape2 data-wrangling r
Add column to data frame with multiple conditions and formulas based on earlier rows
user_164993640
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1
1
22
data-wrangling dataframe r
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