search for: 2595496

...s may provide more relevant information and also to Paulo Ribeiro and Peter Diggle, the authors of geoR.. I really feel that your huge matrix cannot be handled in R that easy, and I get the same kind of error as you: > m=matrix(1,ncol=18227, nrow=18227) Error: cannot allocate vector of size 2595496 Kb In addition: Warning messages: 1: Reached total allocation of 511Mb: see help(memory.size) 2: Reached total allocation of 511Mb: see help(memory.size) However, if you want to compute a distance matrix, have a look to the function: ?dist and try it... You will not have to create the distance...