Insert i th vector number into data frame column name - R

Question

This is likely a quick fix! I am trying to place the ith position of my vector into my data frame column name. I am trying to use paste0 to enter the ith number.

Answer 1

You should treat the dataframe as a list. So avoid the "$" operator and instead use [[]].

so:

spx.sma <- df[[paste0("close.sma.n", sma[i])]]