Applying gsub to various columns

Question

What is the most efficient way to apply gsub to various columns? The following does not work

x1=c(\"10%\",\"20%\",\"30%\")
x2=c(\"60%\",\"50%\",         


        

Answer 1

The first answer works but be careful if you are using data.frame with string: the @docendo discimus's answer will return NAs.

If you want to keep the content of your column as string just remove the as.numeric and convert your table into a data frame after :

as.data.frame(apply(x, 2, function(y) as.numeric(gsub("%", "", y))))
     x1 x2 x3
[1,] 10 60  1
[2,] 20 50  2
[3,] 30 40  3