search for: nseed

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2003 Jul 04
0
degrees of freedom in nlme() (PR#2384)
...not nlme(). However, nlme() may return the wrong number of degrees of freedom without warning and because of that I believe this issue should be considered seriously. Sincerely, Jerome Asselin nlme package version: 3.1-43 R version: 1.7.1 running on Red Hat Linux 7.2 ########### library(nlme) nseeds <- 20 DF <- numeric(nseeds) for(i in 1:nseeds) { set.seed(i) a <- 2 x <- rep(rnorm(3),rep(5,3)) id <- rep(c("a","b","c"),rep(5,3)) y <- a+x+rnorm(15) data <- data.frame(y=y,id=id) initx <- matrix(x[c(1,6,11)],dimnames=list(c("a",&quo...
2010 Nov 10
1
Difficult doubt about choose distances randomly in a matrix with a probability of event
I would like to build a model in R to simulate the seed dispersal by one plant. The plant produced 5 seeds and the probability of falling inside the eight closest space was 0.8 and in the next space 0.2 and in the rest space 0: 0 0 0 0 0 0 0.2 0.2 0.2 0.2 0.2 0 0.2 0.8 0.8 0.8 0.2 0 0.2 0.8 1 0.8 0.2 0 0.2 0.8 0.8 0.8 0.2 0 0.2 0.2 0.2 0.2 0.2 0 0 0 0 0 0 0
2009 Jul 30
3
user supplied random number generators
?Random.user says (in svn trunk) Optionally, functions \code{user_unif_nseed} and \code{user_unif_seedloc} can be supplied which are called with no arguments and should return pointers to the number of seeds and to an integer array of seeds. Calls to \code{GetRNGstate} and \code{PutRNGstate} will then copy this array to and from \code{.Random.seed}. And it offers a...