Assuming storage is not a problem, first generate two matrices, one by each method, call these A and B. Then if dim(A) = dim(B) = c(m,n) and k = m*n
z <- rbinom(k,1, .7) result <- A*z + B*(1-z) Bert Gunter Genentech Nonclinical Biostatistics -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Marcio Resende Sent: Thursday, September 17, 2009 8:11 AM To: r-help@r-project.org Subject: [R] How to separate a function by 2 probabilities Good Mourning, I have a function to generate a matrix as I show part of it; g[j,i]<-if (gen[j,i]==0) al1[i,1]+al1[i,1] else ... However i would like that this function occurred with a probability P and that another function (another formula to generate g matrix) with probability P-1 That´s it, if P is .7, i would like that in 70% of the times (for random i and j) the matrix g was generated according to the formula above and in 30% of the times with a different formula which i did not write could anyone help me? Thank you very much Márcio -- View this message in context: http://www.nabble.com/How-to-separate-a-function-by-2-probabilities-tp254919 43p25491943.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. ______________________________________________ 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.
