May be this helps: set.seed(28) mat1<- matrix(sample(0:50,20,replace=TRUE),nrow=5) A<- dist(mat1) A[2:4]<- 0 set.seed(35) mat2<- matrix(sample(1:50,20,replace=TRUE),nrow=5) B<- dist(mat2) B[which(A==0)]<-0 B # 1 2 3 4 #2 49.07138 #3 0.00000 28.19574 #4 0.00000 55.70458 33.25658 #5 0.00000 41.97618 31.35283 24.55606 A.K.
----- Original Message ----- From: eliza botto <eliza_bo...@hotmail.com> To: "r-help@r-project.org" <r-help@r-project.org> Cc: Sent: Sunday, May 19, 2013 5:05 PM Subject: [R] coping zeros from matrix to another Dear useRs,i have two distance matrices A and B. The distances in A are linked with distances in B. What i want to do is the following...There are some points in A where distances are zero(those points are apart from usual diagonal of zero values).Whereas, in B the distances at those points are not necessarily zeros . i want "0" at those points in B where distance in A is zero. How can i do that??i hope my question is clearthanks indeed in advance,Eliza [[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.
