I want to do Cholesky decomposition of large sparse matrices in Java. Currently I'm using the Parallel Colt library class SparseDoubleCholeskyDecomposition but it's much slower than using my code I...

I wanted to try out Spark for collaborative filtering using MLlib as explained in this tutorial: https://databricks-training.s3.amazonaws.com/movie-recommendation-with-mllib.html The algorithm is b...

Given L and U LU decomposition and vector of constants b such that LU*x=b , is there any built in function which find the x ? Mean something like - X = functionName(L,U,b) Note that in both L ...

I have a sparse matrix whose shape is 570000*3000. I tried nima to do NMF (using the default nmf method, and set max_iter to 65). However, I found nimfa very slow. Have anyone used a faster l...