search for: rep_2

...me code to do this but it is awfully slow. What I want to do is add a new column for each "rep_ " column where I have taken each value and divide it by the mean of all values where "PlateNo" is the same. My data is in the following format: > data PlateNo Well rep_1 rep_2 rep_3 1 A01 1312 963 1172 1 A02 10464 6715 5628 1 A03 3301 3257 3281 1 A04 3895 3350 3496 1 A05 8731 7389 5701 2 A01 7893 6748 5920 2 A02 2912 2385 2586 2 A03 985 785 809 2 A04 1346 1018 1001 2 A05 794 314 486 To generate it copy: a &l...

List, I want to reshape my data, but I'm not sure how to do it... it might be a simple task, but don't know which package does this. "occ.data" (see below) is how my original data are arranged, and I know that with melt() I can reshape it like "y" (see below). However, I just want to build a matrix like the "y" matrix, but with only 2 dimensions. Something