Gabor Grothendieck wrote: > On 7/9/05, Jose Claudio Faria <[EMAIL PROTECTED]> wrote: > >>Dear R users, >> >>The solution is probably simple but I need someone to point me to it. >>How can I to generate a matrix from a numeric sequence of 1:10 like 'A' or 'B' >>below: >> >>A) >>|--------------------| >>| 1 2 3 4 5 | >>|--------------------| >>| 1 | 0 | >>| 2 | 1 0 | >>| 3 | 2 5 0 | >>| 4 | 3 6 8 0 | >>| 5 | 4 7 9 10 0 | >>|--------------------| >> >>B) >>|--------------------| >>| 1 2 3 4 5 | >>|--------------------| >>| 1 | 0 1 2 3 4 | >>| 2 | 1 0 5 6 7 | >>| 3 | 2 5 0 8 9 | >>| 4 | 3 6 8 0 10 | >>| 5 | 4 7 9 10 0 | >>|--------------------| >> > > > Try this and see ?lower.tri > > A <- matrix(0,5,5) > A[lower.tri(A)] <- 1:10 > B <- A + t(A)
Dear Gabor, Thank you, very much: this soluction is nice! Best, -- Jose Claudio Faria Brasil/Bahia/UESC/DCET Estatistica Experimental/Prof. Adjunto mails: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] tel: 73-3634.2779 ______________________________________________ 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