On Thu, 2005-10-13 at 19:47 +0200, Jan Sabee wrote: > Is there any routine to generate for one vector matrix. > If I have X I want to generate start from zero to maximum value each vector. > > For example, I have a vector x = (4,2,3,1,4) > I want to generate n=6 times, for 4, start 0 to 4, then 2 start 0 to 2, ect. > > The result something like this: > > generate(x,n=6) > 1,1,2,1,4 > 1,2,3,0,3 > 4,0,1,1,1 > 3,1,0,1,4 > 0,0,3,0,0 > 4,1,3,0,4 > > Could anyone help me. Thanks. > Regards, > Jan Sabee
If I am properly understanding what you are doing here, you have an initial vector of values. You want to create a matrix, whose columns are the result of random sampling with replacement from the initial vector 'n' times, where the sampling space for each column "i" is from 0:x[i]? If correct, this should do it: > x <- c(4, 2, 3, 1, 4) > x [1] 4 2 3 1 4 > sapply(x, function(x) sample(0:x, 6, replace = TRUE)) [,1] [,2] [,3] [,4] [,5] [1,] 4 2 1 1 2 [2,] 3 0 0 0 0 [3,] 1 2 0 1 3 [4,] 4 2 1 1 1 [5,] 3 1 3 1 0 [6,] 0 1 1 1 0 Just replace '6' in the sample() arguments with the 'n' you require. See ?sapply and ?sample. HTH, Marc Schwartz ______________________________________________ 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