Hi, Suppose I've got a matrix, and the first few elements look like "x1 + x3 + x4 + x5 + x1:x3 + x1:x4" "x1 + x2 + x3 + x5 + x1:x2 + x1:x5" "x1 + x3 + x4 + x5 + x1:x3 + x1:x5" and so on (have got terms from x1 ~ x14).
If I want to replace all the x1 with i7, all x2 with i14, all x3 with i13, for example. Is there an easy way? I tried to put what I want to replace in a vector, like: repl = c("i7", "i14", "i13", "d2", "i8", "i5", "i6", "i3", "A", "i9", "i2", "i4", "i15", "i21") and have another vector, say: > orig [1] "x1" "x2" "x3" "x4" "x5" "x6" "x7" "x8" "x9" "x10" [11] "x11" "x12" "x13" "x14" Then I tried something like gsub(orig, repl, mat) ## mat is the name of my matrix but it didn't work *_*.....it would replace terms like x10 with i70. (I know it may be an easy question...but I haven't done much regular expression) Cheers, Kevin -------------------------------- Ko-Kang Kevin Wang PhD Student Centre for Mathematics and its Applications Building 27, Room 1004 Mathematical Sciences Institute (MSI) Australian National University Canberra, ACT 0200 Australia Homepage: http://wwwmaths.anu.edu.au/~wangk/ Ph (W): +61-2-6125-2431 Ph (H): +61-2-6125-7407 Ph (M): +61-40-451-8301 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html