jim holtman a écrit : > > z1 <- m[m[,1] == 2,, drop=FALSE] > What is the problem you are trying to solve?
It was not really a big problem. Just that without the "drop" argument, The changing returned type complicated the next computations. drop=TRUE makes it homogeneous, which is what I needed. Thanks for your answer. ______________________________________________ [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
