Re: [R] remove NA rows and columns
Hello, thank you both very much! It is as easy as expected... (I think I still have to learn a lot!) Have a nice day! Antje Vladimir Eremeev schrieb: > Or, these operations can be called in one command: > >> testmatrix[-which(apply(testmatrix,1,function(x)all(is.na(x,-which(apply(testmatrix,2,function(x)all(is.na(x] > [,1] [,2] > [1,]11 > [2,]22 > [3,]11 > [4,]22 > > > > Vladimir Eremeev wrote: >>> testmatrix >> [,1] [,2] [,3] [,4] >> [1,] NA NA NA NA >> [2,] NA11 NA >> [3,] NA22 NA >> [4,] NA11 NA >> [5,] NA22 NA >> [6,] NA NA NA NA >> >>> tm1<-testmatrix[,-which(apply(testmatrix,2,function(x)all(is.na(x] >>> tm1 >> [,1] [,2] >> [1,] NA NA >> [2,]11 >> [3,]22 >> [4,]11 >> [5,]22 >> [6,] NA NA >> >>> tm2<-tm1[-which(apply(testmatrix,1,function(x)all(is.na(x,] >>> tm2 >> [,1] [,2] >> [1,]11 >> [2,]22 >> [3,]11 >> [4,]22 >> >> >> Antje wrote: >>> I guess, it's a rather simple thing but I cannot find a short way to >>> reduce a >>> matrix, removing all rows and columns having just NA elements. >>> >>> testmatrix <- matrix(nrow=6, ncol=4) >>> testmatrix[2:5,2:3] <- seq(2) >>> >>> > testmatrix >>> [,1] [,2] [,3] [,4] >>> [1,] NA NA NA NA >>> [2,] NA11 NA >>> [3,] NA22 NA >>> [4,] NA11 NA >>> [5,] NA22 NA >>> [6,] NA NA NA NA >>> >>> the new matrix should look like this (by the way, I don't "know" which >>> rows and >>> columns are the one to be deleted... >>> >>> > testmatrix >>> [,1] [,2] >>> [1,] 11 >>> [2,] 22 >>> [3,] 11 >>> [4,] 22 >>> >> > __ R-help@stat.math.ethz.ch 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.
Re: [R] remove NA rows and columns
Antje wrote: > Hello, > > I guess, it's a rather simple thing but I cannot find a short way to reduce a > matrix, removing all rows and columns having just NA elements. > > testmatrix <- matrix(nrow=6, ncol=4) > testmatrix[2:5,2:3] <- seq(2) > > > testmatrix > [,1] [,2] [,3] [,4] > [1,] NA NA NA NA > [2,] NA11 NA > [3,] NA22 NA > [4,] NA11 NA > [5,] NA22 NA > [6,] NA NA NA NA > > the new matrix should look like this (by the way, I don't "know" which rows > and > columns are the one to be deleted... > > > testmatrix > [,1] [,2] > [1,] 11 > [2,] 22 > [3,] 11 > [4,] 22 testmatrix[!apply(is.na(testmatrix), 1, all), !apply(is.na(testmatrix), 2, all)] [,1] [,2] [1,]11 [2,]22 [3,]11 [4,]22 > Ciao, > Antje > > __ > R-help@stat.math.ethz.ch 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. > > -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 __ R-help@stat.math.ethz.ch 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.
Re: [R] remove NA rows and columns
Or, these operations can be called in one command: > testmatrix[-which(apply(testmatrix,1,function(x)all(is.na(x,-which(apply(testmatrix,2,function(x)all(is.na(x] [,1] [,2] [1,]11 [2,]22 [3,]11 [4,]22 > Vladimir Eremeev wrote: > >> testmatrix > [,1] [,2] [,3] [,4] > [1,] NA NA NA NA > [2,] NA11 NA > [3,] NA22 NA > [4,] NA11 NA > [5,] NA22 NA > [6,] NA NA NA NA > >> tm1<-testmatrix[,-which(apply(testmatrix,2,function(x)all(is.na(x] >> tm1 > [,1] [,2] > [1,] NA NA > [2,]11 > [3,]22 > [4,]11 > [5,]22 > [6,] NA NA > >> tm2<-tm1[-which(apply(testmatrix,1,function(x)all(is.na(x,] >> tm2 > [,1] [,2] > [1,]11 > [2,]22 > [3,]11 > [4,]22 > > > Antje wrote: >> >> I guess, it's a rather simple thing but I cannot find a short way to >> reduce a >> matrix, removing all rows and columns having just NA elements. >> >> testmatrix <- matrix(nrow=6, ncol=4) >> testmatrix[2:5,2:3] <- seq(2) >> >> > testmatrix >> [,1] [,2] [,3] [,4] >> [1,] NA NA NA NA >> [2,] NA11 NA >> [3,] NA22 NA >> [4,] NA11 NA >> [5,] NA22 NA >> [6,] NA NA NA NA >> >> the new matrix should look like this (by the way, I don't "know" which >> rows and >> columns are the one to be deleted... >> >> > testmatrix >> [,1] [,2] >> [1,] 11 >> [2,] 22 >> [3,] 11 >> [4,] 22 >> > > -- View this message in context: http://www.nabble.com/remove-NA-rows-and-columns-tf4192605.html#a11923066 Sent from the R help mailing list archive at Nabble.com. __ R-help@stat.math.ethz.ch 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.
Re: [R] remove NA rows and columns
> testmatrix [,1] [,2] [,3] [,4] [1,] NA NA NA NA [2,] NA11 NA [3,] NA22 NA [4,] NA11 NA [5,] NA22 NA [6,] NA NA NA NA > tm1<-testmatrix[,-which(apply(testmatrix,2,function(x)all(is.na(x] > tm1 [,1] [,2] [1,] NA NA [2,]11 [3,]22 [4,]11 [5,]22 [6,] NA NA > tm2<-tm1[-which(apply(testmatrix,1,function(x)all(is.na(x,] > tm2 [,1] [,2] [1,]11 [2,]22 [3,]11 [4,]22 Antje wrote: > > I guess, it's a rather simple thing but I cannot find a short way to > reduce a > matrix, removing all rows and columns having just NA elements. > > testmatrix <- matrix(nrow=6, ncol=4) > testmatrix[2:5,2:3] <- seq(2) > > > testmatrix > [,1] [,2] [,3] [,4] > [1,] NA NA NA NA > [2,] NA11 NA > [3,] NA22 NA > [4,] NA11 NA > [5,] NA22 NA > [6,] NA NA NA NA > > the new matrix should look like this (by the way, I don't "know" which > rows and > columns are the one to be deleted... > > > testmatrix > [,1] [,2] > [1,] 11 > [2,] 22 > [3,] 11 > [4,] 22 > -- View this message in context: http://www.nabble.com/remove-NA-rows-and-columns-tf4192605.html#a11923002 Sent from the R help mailing list archive at Nabble.com. __ R-help@stat.math.ethz.ch 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] remove NA rows and columns
Hello, I guess, it's a rather simple thing but I cannot find a short way to reduce a matrix, removing all rows and columns having just NA elements. testmatrix <- matrix(nrow=6, ncol=4) testmatrix[2:5,2:3] <- seq(2) > testmatrix [,1] [,2] [,3] [,4] [1,] NA NA NA NA [2,] NA11 NA [3,] NA22 NA [4,] NA11 NA [5,] NA22 NA [6,] NA NA NA NA the new matrix should look like this (by the way, I don't "know" which rows and columns are the one to be deleted... > testmatrix [,1] [,2] [1,] 11 [2,] 22 [3,] 11 [4,] 22 Ciao, Antje __ R-help@stat.math.ethz.ch 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.
