src/test/scripts/functions/codegenalg/Algorithm_PNMF.R

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args <- commandArgs(TRUE)
library("Matrix")

X = readMM(paste(args[1], "X.mtx", sep=""));
W = readMM(paste(args[1], "W.mtx", sep=""));
H = readMM(paste(args[1], "H.mtx", sep=""));

k = as.integer(args[2]);
eps = as.double(args[3]);
max_iter = as.integer(args[4]);
iter = 1;

while( iter < max_iter ) {
   H = (H*(t(W)%*%(X/(W%*%H+eps)))) / (colSums(W)%*%matrix(1,1,ncol(H)));
   W = (W*((X/(W%*%H+eps))%*%t(H))) / (matrix(1,nrow(W),1)%*%t(rowSums(H)));
   obj = sum(W%*%H) - sum(X*log(W%*%H+eps));
   print(paste("obj=", obj))
   iter = iter + 1;
}

writeMM(as(W,"CsparseMatrix"), paste(args[5], "W", sep=""));
writeMM(as(H,"CsparseMatrix"), paste(args[5], "H", sep=""));