compare dataframes columns in R

Question

I have 2 dataframes. Both of them have the same columns names, but the first one has more variables than the second one. I want to know which columns match on both DFs or which columns are in the first DF that are not in the second one

Answer 1

welcome to SO!

You can modify this code to help answer your question. Check out ?setdiff for more information on that command.

vars1 <- colnames(dataframe1)
vars2 <- colnames(dataframe2)

setdiff(vars1, vars2)

Answer 2

It seems that you want to find out the unique part of colnames(df1) and colnames(df2) ，maybe you can try gplots::venn

library(gplots)
t1 <- c("a", "b", "c")
t2 <- c("a", "b" ,"d")  # assume t1 and t2 is your column name of df1 and df2
test <- venn(list(t1,t2))

test

you got: