81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
import pyqtgraph as pg
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import numpy as np
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from numpy.testing import assert_array_almost_equal, assert_almost_equal
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np.random.seed(12345)
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def testSolve3D():
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p1 = np.array([[0,0,0,1],
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[1,0,0,1],
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[0,1,0,1],
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[0,0,1,1]], dtype=float)
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# transform points through random matrix
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tr = np.random.normal(size=(4, 4))
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tr[3] = (0,0,0,1)
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p2 = np.dot(tr, p1.T).T[:,:3]
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# solve to see if we can recover the transformation matrix.
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tr2 = pg.solve3DTransform(p1, p2)
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assert_array_almost_equal(tr[:3], tr2[:3])
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def test_interpolateArray():
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data = np.array([[ 1., 2., 4. ],
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[ 10., 20., 40. ],
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[ 100., 200., 400.]])
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x = np.array([[ 0.3, 0.6],
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[ 1. , 1. ],
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[ 0.5, 1. ],
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[ 0.5, 2.5],
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[ 10. , 10. ]])
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result = pg.interpolateArray(data, x)
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#import scipy.ndimage
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#spresult = scipy.ndimage.map_coordinates(data, x.T, order=1)
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spresult = np.array([ 5.92, 20. , 11. , 0. , 0. ]) # generated with the above line
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assert_array_almost_equal(result, spresult)
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# test mapping when x.shape[-1] < data.ndim
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x = np.array([[ 0.3, 0],
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[ 0.3, 1],
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[ 0.3, 2]])
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r1 = pg.interpolateArray(data, x)
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r2 = pg.interpolateArray(data, x[0,:1])
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assert_array_almost_equal(r1, r2)
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# test mapping 2D array of locations
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x = np.array([[[0.5, 0.5], [0.5, 1.0], [0.5, 1.5]],
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[[1.5, 0.5], [1.5, 1.0], [1.5, 1.5]]])
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r1 = pg.interpolateArray(data, x)
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#r2 = scipy.ndimage.map_coordinates(data, x.transpose(2,0,1), order=1)
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r2 = np.array([[ 8.25, 11. , 16.5 ], # generated with the above line
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[ 82.5 , 110. , 165. ]])
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assert_array_almost_equal(r1, r2)
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def test_subArray():
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a = np.array([0, 0, 111, 112, 113, 0, 121, 122, 123, 0, 0, 0, 211, 212, 213, 0, 221, 222, 223, 0, 0, 0, 0])
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b = pg.subArray(a, offset=2, shape=(2,2,3), stride=(10,4,1))
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c = np.array([[[111,112,113], [121,122,123]], [[211,212,213], [221,222,223]]])
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assert np.all(b == c)
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# operate over first axis; broadcast over the rest
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aa = np.vstack([a, a/100.]).T
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cc = np.empty(c.shape + (2,))
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cc[..., 0] = c
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cc[..., 1] = c / 100.
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bb = pg.subArray(aa, offset=2, shape=(2,2,3), stride=(10,4,1))
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assert np.all(bb == cc)
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if __name__ == '__main__':
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test_interpolateArray() |