double[] data=new double[DSIZE];
for (int j=0; j<DSIZE; j++) {
data[j]=Rand.nextDouble();
}
Index indy=Indexz.createRandomChoice(DSIZE, SIZE);
m.replaceRow(i,SparseIndexedVector.create(SIZE, indy, data));
}
printTime("Construct sparse matrix: ");
// System.out.println("First row sum = "+m.getRow(0).elementSum());