[R] "Spreading risk" in a matrix

I have a binary matrix that represents a map of invasive species risk (1 = infested; 0 = uninfested). It started as a matrix of probabilities (developed in ArcMap) that I converted to binary with this R code: binary.matrix<-matrix(rbinom(length(prob.matrix),prob=prob.matrix,size=1),nrow=nrow(prob.

Re: [R] "Spreading risk" in a matrix

How do I use the buffer function since I have more than the two columns it calls for? (I have 46!) -- View this message in context: http://www.nabble.com/%22Spreading-risk%22-in-a-matrix-tp18535227p18537082.html Sent from the R help mailing list archive at Nabble.com.

[R] Boot warning messages

Hello, I am attempting to run a bootstrap on a data frame, but something is going wrong. I have 2 data frames: AB V1 V2 V3V1 V2 V3 1 1471 10 13 16 2 2582 11 14 17 3 3693 12 15 18 Over each

[R] rbinom for a matrix

I have a large matrix full of probabilities; I would like to convert each probability to a 1 or a 0 using rbinom. How can I do this on the entire matrix? The matrix was converted from a raster ArcMap dataset, so the matrix is essentially a map. Because of this, I have no column headings. Thanks!

Re: [R] rbinom for a matrix

ows in the matrix is 56. There are 2576 total cells (observations). Each cell has its own probability. Thanks for your help! Ben Bolker wrote: > > ACroske yahoo.com> writes: > >> >> >> I have a large matrix full of probabilities; I would like to convert each &

Re: [R] rbinom for a matrix

PGP SIGNED MESSAGE- > Hash: SHA1 > > Dylan Beaudette wrote: > | On Wednesday 09 July 2008, Ben Bolker wrote: > |> ACroske yahoo.com> writes: > |>> I have a large matrix full of probabilities; I would like to convert > each > |>> probability to a 1 or a