[R] How to Rename Column Labels?

[Youn Se Hwan]

Hi,

How do I rename the column labels in the table?

For Instance, if I have a table like this, and I want to have the column labels changed from "A1 A2 A3 A4 A5" to "Mike Kate Michelle Paul Young"

      A1     A2     A3    A4    A5
1  33    44      55      66    77
2
3
4
5
6
7
7
8
9

and my text file location is: ""/Users/MAC/Desktop/data.txt"

When I type in colnames(data.txt)[1] <- "Income", I get an error message saying "target of assignment expands to non-language object".

Thanks!