Baunsgaard commented on a change in pull request #892: Extend Python API (rand,
lm, matrix multiplication)
URL: https://github.com/apache/systemml/pull/892#discussion_r410684799
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File path: src/main/python/tests/test_matrix_aggregations.py
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@@ -84,6 +86,63 @@ def test_var2(self):
def test_var3(self):
self.assertTrue(np.allclose(sds.matrix(m1).var(axis=1).compute(),
m1.var(axis=1, ddof=1).reshape(dim, 1)))
+ def test_rand_basic(self):
+ seed = 15
+ shape = (20, 20)
+ min_max = (0, 1)
+ sparsity = 0.2
+
+ m = sds.rand(rows=shape[0], cols=shape[1], pdf="uniform",
min=min_max[0], max=min_max[1],
+ seed=seed, sparsity=sparsity).compute()
+
+ self.assertTrue(m.shape == shape)
+ self.assertTrue((m.min() >= min_max[0]) and (m.max() <= min_max[1]))
+
+ # sparsity
+ m_flat = m.flatten('F')
+ count, bins, patches = plt.hist(m_flat)
+
+ non_zero_value_percent = sum(count[1:]) * 100 / count[0]
+ e = 0.05
+ self.assertTrue((non_zero_value_percent >= (sparsity - e) * 100)
+ and (non_zero_value_percent <= (sparsity + e) * 100))
+ self.assertTrue(sum(count) == (shape[0] * shape[1]))
+
+ def test_rand_distribution(self):
+ seed = 15
+ shape = (20, 20)
+ min_max = (0, 1)
+
+ m = sds.rand(rows=shape[0], cols=shape[1], pdf="uniform",
min=min_max[0], max=min_max[1],
+ seed=seed).compute()
+
+ m_flat = m.flatten('F')
+
+ dist = best_distribution(m_flat)
+ self.assertTrue(dist == 'uniform')
+
+ m1 = sds.rand(rows=shape[0], cols=shape[1], pdf="normal",
min=min_max[0], max=min_max[1],
+ seed=seed).compute()
+
+ m1_flat = m1.flatten('F')
+
+ dist = best_distribution(m1_flat)
+ self.assertTrue(dist == 'norm')
+
+
+def best_distribution(data):
+ distributions = ['norm', 'uniform']
+ result = dict()
+
+ for dist in distributions:
+ param = getattr(st, dist).fit(data)
+
+ D, p_value = st.kstest(data, dist, args=param)
+ result[dist] = p_value
+
+ best_dist = max(result, key=result.get)
+ return best_dist
+
Review comment:
if it removes the newlines, that would be great :+1:
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