Re: [R] Huge matrix: allocation works but assignment fails

2009-10-01 Thread Ben Bolker
> Remi wrote: > > > (Failed to allocate a vector of size...) > > What can I do? And, maybe even more important, how can one explains such > > a behavior? If your matrices are not sparse, get more memory. If they are, help("sparseMatrix",package=Matrix) ?

Re: [R] Huge matrix: allocation works but assignment fails

2009-10-01 Thread Uwe Ligges
Remi wrote: Hello everyone, I am working with one big matrix: w=matrix(0,18000,18000) on a Linux computer with 16Go of RAM. I can actually create the matrix, and even access elements: w[10,10] 0 but if I try to change one element, it fails: w[10,10]=1 In this case your object is copied an

[R] Huge matrix: allocation works but assignment fails

2009-10-01 Thread Remi
Hello everyone, I am working with one big matrix: w=matrix(0,18000,18000) on a Linux computer with 16Go of RAM. I can actually create the matrix, and even access elements: w[10,10] 0 but if I try to change one element, it fails: w[10,10]=1 Erreur : impossible d'allouer un vecteur de taille 253