Question

I am using a data frame in R where col4 its supposed to be less than col5, but sometimes that does not happen.

Is there anyway I could shift the value from col4 to col5, and viceversa without having to use a forloop, since they are quite time expensive in R.

I.e., if for a given row col4 = 100, and col5=10, I’d like to shift them, and col4 should become 10, and col5 should become 100.

Advise welcome, thanks in advance!

Answer 1

Assuming that your data frame is named d:

newCol4 <- pmin(d$col4, d$col5)
newCol5 <- pmax(d$col4, d$col5)

d$col4 <- newCol4
d$col5 <- newCol5