R assign column to dataframe with variable name
13,320
The syntax is
dframe[[destination_string]] <- mynewcolumn
For example,
getModified <- function(dframe, destination_string, foo) {
dframe[[destination_string]] <- foo
dframe
}
> getModified(data.frame(A=1:10), "newColName", 11:20)
A newColName
1 1 11
2 2 12
3 3 13
4 4 14
5 5 15
6 6 16
7 7 17
8 8 18
9 9 19
10 10 20
Author by
Skylar Saveland
Updated on June 04, 2022Comments
-
Skylar Saveland almost 2 years
Assign to a dataframe colum with a variable name.
getModified <- function(dframe, destination_string, foo, bar) { # complex calculations on foo and bar getting mynewcol here # ... # I want to add mynewcolumn with name in destination_string # if "blah" was the destination_string, the result would be as: #dframe$blah <- mynewcol #return(dframe) # what is the syntax for using the variable? # no luck here: dframe[, destination_string] <- mynewcolumn return(dframe) }
so that I could call
dframe <- getModified(dframe, "nameofmynewcolum", foo, bar) dframe$nameofmynewcolumn