yehengxin wrote: > > Why does R need the concept of "Vector"? In my opinion, it is a useless > and confusing concept. A vector is simply a special case of a matrix > whose row or column number is equal to 1. When I take submatrix from one > matrix and if row or column number is 1, R will automatically convert it > into a vector. It is very straightforward that a submatrix of a matrix > should be a matrix. In each time, I have to use as.matrix() to convert > the vector back to matrix. It is very annoying! >
Except that to a computer all "matricies" and "arrays" are just vectors for which some human arbitrarily declared something like "row break every n entries". And R can be told not to perform the conversion from sub-matrix to vector, open the help page for the subset operator: ?"[" And play with the drop option. -Charlie ----- Charlie Sharpsteen Undergraduate-- Environmental Resources Engineering Humboldt State University -- View this message in context: http://n4.nabble.com/Confusing-concept-of-vector-and-matrix-in-R-tp1707170p1735190.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list 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.
