I have labels stored as letters and want to convert to numeric, for example:
a <- c("A", "B", "A", "A", "C", "E", "D", "A", "B")
Desired output
[1] 1 2 1 1 3 5 4 1 2
Convert labels to numeric labels
3
asked by anonymous 14.11.2016 / 16:14
1 answer
4
Transform your vector a into factor and then convert it to numeric:
as.numeric(factor(a))
[1] 1 2 1 1 3 5 4 1 2
You can even assign different numeric values for a levels. For example,
as.numeric(factor(a, levels=c("E", "D", "C", "B", "A")))
[1] 5 4 5 5 3 1 2 5 4
14.11.2016 / 17:32