def test_dtypes(self): # Test with different data types for dtype in [np.int16, np.uint16, np.int32, np.uint32, np.int64, np.uint64]: coords = np.array( [[1, 0, 1, 2, 3, 4], [1, 6, 1, 3, 2, 0]], dtype=dtype) shape = (5, 8) uncoords = 8*coords[0]+coords[1] assert_equal(np.ravel_multi_index(coords, shape), uncoords) assert_equal(coords, np.unravel_index(uncoords, shape)) uncoords = coords[0]+5*coords[1] assert_equal( np.ravel_multi_index(coords, shape, order='F'), uncoords) assert_equal(coords, np.unravel_index(uncoords, shape, order='F')) coords = np.array( [[1, 0, 1, 2, 3, 4], [1, 6, 1, 3, 2, 0], [1, 3, 1, 0, 9, 5]], dtype=dtype) shape = (5, 8, 10) uncoords = 10*(8*coords[0]+coords[1])+coords[2] assert_equal(np.ravel_multi_index(coords, shape), uncoords) assert_equal(coords, np.unravel_index(uncoords, shape)) uncoords = coords[0]+5*(coords[1]+8*coords[2]) assert_equal( np.ravel_multi_index(coords, shape, order='F'), uncoords) assert_equal(coords, np.unravel_index(uncoords, shape, order='F'))
def test_0d(self): # gh-580 x = np.unravel_index(0, ()) assert_equal(x, ()) assert_raises_regex(ValueError, "0d array", np.unravel_index, [0], ()) assert_raises_regex( ValueError, "out of bounds", np.unravel_index, [1], ())
def test_basic(self): assert_equal(np.unravel_index(2, (2, 2)), (1, 0)) assert_equal(np.ravel_multi_index((1, 0), (2, 2)), 2) assert_equal(np.unravel_index(254, (17, 94)), (2, 66)) assert_equal(np.ravel_multi_index((2, 66), (17, 94)), 254) assert_raises(ValueError, np.unravel_index, -1, (2, 2)) assert_raises(TypeError, np.unravel_index, 0.5, (2, 2)) assert_raises(ValueError, np.unravel_index, 4, (2, 2)) assert_raises(ValueError, np.ravel_multi_index, (-3, 1), (2, 2)) assert_raises(ValueError, np.ravel_multi_index, (2, 1), (2, 2)) assert_raises(ValueError, np.ravel_multi_index, (0, -3), (2, 2)) assert_raises(ValueError, np.ravel_multi_index, (0, 2), (2, 2)) assert_raises(TypeError, np.ravel_multi_index, (0.1, 0.), (2, 2)) assert_equal(np.unravel_index((2*3 + 1)*6 + 4, (4, 3, 6)), [2, 1, 4]) assert_equal( np.ravel_multi_index([2, 1, 4], (4, 3, 6)), (2*3 + 1)*6 + 4) arr = np.array([[3, 6, 6], [4, 5, 1]]) assert_equal(np.ravel_multi_index(arr, (7, 6)), [22, 41, 37]) assert_equal( np.ravel_multi_index(arr, (7, 6), order='F'), [31, 41, 13]) assert_equal( np.ravel_multi_index(arr, (4, 6), mode='clip'), [22, 23, 19]) assert_equal(np.ravel_multi_index(arr, (4, 4), mode=('clip', 'wrap')), [12, 13, 13]) assert_equal(np.ravel_multi_index((3, 1, 4, 1), (6, 7, 8, 9)), 1621) assert_equal(np.unravel_index(np.array([22, 41, 37]), (7, 6)), [[3, 6, 6], [4, 5, 1]]) assert_equal( np.unravel_index(np.array([31, 41, 13]), (7, 6), order='F'), [[3, 6, 6], [4, 5, 1]]) assert_equal(np.unravel_index(1621, (6, 7, 8, 9)), [3, 1, 4, 1])
def test_intersect1d_indices(self): # unique inputs a = np.array([1, 2, 3, 4]) b = np.array([2, 1, 4, 6]) c, i1, i2 = intersect1d(a, b, assume_unique=True, return_indices=True) ee = np.array([1, 2, 4]) assert_array_equal(c, ee) assert_array_equal(a[i1], ee) assert_array_equal(b[i2], ee) # non-unique inputs a = np.array([1, 2, 2, 3, 4, 3, 2]) b = np.array([1, 8, 4, 2, 2, 3, 2, 3]) c, i1, i2 = intersect1d(a, b, return_indices=True) ef = np.array([1, 2, 3, 4]) assert_array_equal(c, ef) assert_array_equal(a[i1], ef) assert_array_equal(b[i2], ef) # non1d, unique inputs a = np.array([[2, 4, 5, 6], [7, 8, 1, 15]]) b = np.array([[3, 2, 7, 6], [10, 12, 8, 9]]) c, i1, i2 = intersect1d(a, b, assume_unique=True, return_indices=True) ui1 = np.unravel_index(i1, a.shape) ui2 = np.unravel_index(i2, b.shape) ea = np.array([2, 6, 7, 8]) assert_array_equal(ea, a[ui1]) assert_array_equal(ea, b[ui2]) # non1d, not assumed to be uniqueinputs a = np.array([[2, 4, 5, 6, 6], [4, 7, 8, 7, 2]]) b = np.array([[3, 2, 7, 7], [10, 12, 8, 7]]) c, i1, i2 = intersect1d(a, b, return_indices=True) ui1 = np.unravel_index(i1, a.shape) ui2 = np.unravel_index(i2, b.shape) ea = np.array([2, 7, 8]) assert_array_equal(ea, a[ui1]) assert_array_equal(ea, b[ui2])
def test_writeability(self): # See gh-7269 x, y = np.unravel_index([1, 2, 3], (4, 5)) assert_(x.flags.writeable) assert_(y.flags.writeable)