How to reference a column in a dataframe through a variable in R

Asked Nov 01 '19 at 21:41

Active Nov 02 '19 at 01:53

Viewed 73 times

I'm trying to iterate through columns in an R data.frame.

To do so, I'm hoping to write a for loop which loops over the column names and then filters the data.table accordingly with values.

My issue is that given the syntax:

df[which(df$XX == y), ]

XX needs to actually be a column name versus a variable that is a string equivalent to the column name.

Is there a way to loop over the columns via inputting a variable?

Many thanks!

edited Nov 02 '19 at 01:53

mnist

asked Nov 01 '19 at 21:41

wingsoficarus116

Please provide a [reproducible minimal example](https://stackoverflow.com/q/5963269/8107362). Especially, provide some sample data. – mnist Nov 01 '19 at 21:45
3

```DF[DF[[XX]] == y, ]``` – Cole Nov 01 '19 at 22:14

0 Answers0