Damian Eads writes:

Hi,

Can you be more specific? Do you need sparse matrices to represent observation vectors because they are sparse? Or do you need sparse matrices to represent distance matrices because most vectors you are clustering are similar while a few are dissimilar? Damian

On Tue, Dec 9, 2008 at 1:28 PM, Bab Tei wrote:

...

Hi Does the distance function in spatial package support sparse matrix? regards

Hi I need sparse matrices to represent observation vectors because they are sparse. I have a large sparse matrix. I also use kmeans (Besides hierarchical clustering) which can directly work with very large data. Teimourpour