I have over 300 columns with different header names. Is there a way I can select only those columns containing "A" or "B"?
Here is what I have tried that works:
newdf <- select(olddf, contains("A"))
This code works, but I am trying to incorporate 2 conditions within the above statement. For example the below does not work:
newdf <- select(olddf, contains("A" | "B"))