src/main/python/tests/matrix/test_qr.py

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import unittest
import numpy as np
from systemds.context import SystemDSContext


class TestQR(unittest.TestCase):
    def setUp(self):
        self.sds = SystemDSContext(capture_stdout=True, logging_level=50)

    def tearDown(self):
        self.sds.close()

    def test_qr_basic(self):
        input_matrix = np.array(
            [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], [13, 14, 15, 16]]
        )

        sds_h, sds_r = self.sds.from_numpy(input_matrix).qr().compute()
        np_q, np_r = np.linalg.qr(input_matrix, "complete")
        np_h, np_tau = np.linalg.qr(input_matrix, "raw")

        self.assertTrue(np.allclose(sds_r, np_r, 1e-9))


if __name__ == "__main__":
    unittest.main()