Generating gamma random field with given covariance matrix

Question

I have to generate multivariate gamma distributions with given positive-definite covariance matrix. Anyone can suggest me a method?

Thanks,

Answer 1

library(clusterGeneration)
genPositiveDefMat(dim,...) #Where  dim is the dimension of the matrix, explore the   #function  

You can now use any package that will generate a multivariate gamma in R using the positive definite matrix above.