Hi Manli. Try the replace() function as below: replace(a,is.na(a),0) #where a is the name of your 50 x 50 matrix
Below is an example: a<-matrix(c(sqrt(-2:3)), nrow=2) # produces a 2 x 3 matrix some of whose elements are NaN (or NA) # due to square root operator on negative integers replace(a, is.na(a), 0) [,1] [,2] [,3] [1,] 0 0 1.414214 [2,] 0 1 1.732051 ############################ bartjoosen wrote: > > ?is.na > > > > Manli Yan wrote: >> >> I have a 50*50 matrix,some entry are NAs,I want to replace these NA by >> 0,so can I use some syntax to do so other than using ifelse? >> I tried to use replace(a,NA,0),it didnt work~~(a is matrix name) >> >> Thanks~ >> >> [[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. >> >> > > -- View this message in context: http://www.nabble.com/how-to-omit-NA-without-using-ifelse-tp22365996p22387672.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.