I have a data.frame with the name "abcframe"
a b c
1 1 1
2 2 3
How might I find whether a column exists or not in a given data frame? For example, I would like to find whether a column d exists in the data.frame abcframe.
ベストアンサー1
Assuming that the name of your data frame is dat and that your column name to check is "d", you can use the %in% operator:
if("d" %in% colnames(dat))
{
cat("Yep, it's in there!\n");
}