Sorry, there were mistakes in variable names... (I realized only after pressed the send button)
Domenico Vistocco wrote: > dave mitchell wrote: > >> Dear all, >> Possibly a rudimentary question, however any help is greatly appreciated. I >> am sorting a large matrix into an array of dim(p(i),q,3). I put each entry >> into a corresponding matrix (1 of the 3) based on some criteria. I figure >> this will assist me in condensing code as I can loop through the 3rd >> dimension of the array instead of generating 3 separate matrices and using >> the same block of code 3 times. My question is how to get the colnames of >> the 3 nested matrices in the array to match the colnames of the data >> matrix. In other words... >> >> > Denoting with array3d the array and with matrix2d the data matrix: > > colnames(array3d)=colnames(array3d) > colnames(array3d)=colnames(matrix2d) > Otherwise, using dimnames: > dimnames(array3d)=list(NULL,colnames(array3d),NULL) > dimnames(array3d)=list(NULL,colnames(matrix2d),NULL) > You can operate using the "[" operator, that is: > array3d[,"region",] to extract the region columns from each dimension. > > You obtain the same effect using the column number, i.e. > array3d[,2,] > > domenico > >> DATA: >> Exp region Qty Ct ...q >> 1 S CB 3.55 2.15 . >> 2 S TG 4.16 2.18 . >> 3 C OO 2.36 3.65 . >> 4 C . . . >> . . . . . >> . . . . . >> . . . . . >> p ........................... >> >> >> >> ARRAY >> 1 >> [,1] [,2] [,3] [,4]...q >> 1 SOME DATA WILL FILL THIS . >> 2 . . . . >> 3 . . . . >> 4 . . . . >> . . . . . >> . . . . . >> . . . . . >> P(1) ........................... >> >> 2 >> [,1] [,2] [,3] [,4]...q >> 1 SOME DATA WILL FILL THIS . >> 2 . . . . >> 3 . . . . >> 4 . . . . >> . . . . . >> . . . . . >> . . . . . >> P(2) ........................... >> 3 >> [,1] [,2] [,3] [,4]...q >> 1 SOME DATA WILL FILL THIS . >> 2 . . . . >> 3 . . . . >> 4 . . . . >> . . . . . >> . . . . . >> . . . . . >> P(3) ........................... >> >> Again, how to get those [,1], [,2]... to read (and operate) in the same >> fashion as the column names in the data matrix? Also, am I interpreting the >> dimensions of the array incorrectly? Please feel free to post any helpful >> links on the subject, as I have found "dimnames" and "array" in the R-help >> documentation unhelpful. Any help is greatly appreciated. >> >> Dave Mitchell >> Undergraduate: Statistics and Mathematics, >> University of Illinois, Urbana-Champaign >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> >> >> > > ______________________________________________ > 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. > > ______________________________________________ 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.
