I would like to avoid a "for loop" to get a vector of data taken from rows of a data frame for specific columns. An example is the following (I can't apply min to every row of df, this is just an example):
c0=data.frame(a=c(3,-2,12,7,-23,17) , b=c(-1,-3,14,2,6,19)) c1=apply(c0,1,which.min) > c1 [1] 2 2 1 2 1 1 I would like to get a result like the following call, but without employing a "for loop": d1=c(c0[1,c1[1]], c0[2,c1[2]], c0[3,c1[3]], c0[4,c1[4]], c0[5,c1[5]], c0[6,c1[6]]) > d1 [1] -1 -3 12 2 -23 17 Thanks a lot for any help! ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
