public void testRowsIndexed() {
SparseMatrixLil A = new SparseMatrixLil("1 5 3; 2 8 5; 1 9 4; 2 5 3");
DenseMatrix indexes = new DenseMatrix("2; 1; 1");
SparseMatrixLil B = A.rows(indexes);
System.out.println(B.toDense());
assertTrue(B.equals(new SparseMatrixLil("1 9 4; 2 8 5; 2 8 5")));
}
public void testSliceSparse() {
SparseMatrixLil A = sprand(5, 8);
SparseMatrixLil B = sprand(5, 12);
SparseMatrixLil C = sprand(4, 8);
SparseMatrixLil AB = A.concatRight(B);
assertTrue(A.equals(AB.cols(0, 8)));
assertTrue(B.equals(AB.cols(8, 20)));
SparseMatrixLil AC = A.concatDown(C);
assertTrue(A.equals(AC.rows(0, 5)));
assertTrue(C.equals(AC.rows(5, 9)));
A = spzeros(1, 5);
A.append(0, 2, 3);
assertEquals(A.row(0).cols, 5);
}