I'm having flashbacks to all kinds of crazy Matlab sparse matrix hacking...
On Wed, Jan 7, 2015 at 3:07 PM, Miles Lubin <[email protected]> wrote: > It may be more efficient (given the current implementation) to filter the > I, J, and V arrays directly and then call sparse() again. > > > On Wednesday, January 7, 2015 12:48:31 PM UTC-7, Christoph Ortner wrote: >> >> >> Thanks for your replies - I will write a short piece of code that shows >> the performance problem, and then submit an issue. >> Christoph >> >> P.S: I do use sparse(I,J,V) to construct the matrix, but I am then unable >> to extract a sub matrix because the slicing is so slow. >> >
