r - Position or row in which a term is found in vector -

i indicate possition or row of elements in vectors

df <- data.frame(g1=c("a","b","e","d","c"),                  g2=c("a","c","b","d","e")) 

in case g1 reference, "a" first, "b", second, "e", third , on. see in g2 "a" first, "b" third. can output:

df2 <- data.frame(g1=c(1:5), g2=c(1, 3, 5, 4, 2)) row.names(df2) <- c("a","b","e","d","c") 

try match:

df2 <- data.frame(lapply(df, function(x) match(df$g1, x)), row.names=df$g1) #   g1 g2 #  1  1 # b  2  3 # e  3  5 # d  4  4 # c  5  2