library packages

.venv/lib/python3.12/site-packages/sklearn/cluster/tests/common.py

@@ -0,0 +1,37 @@
+"""
+Common utilities for testing clustering.
+
+"""
+
+import numpy as np
+
+###############################################################################
+# Generate sample data
+
+
+def generate_clustered_data(
+    seed=0, n_clusters=3, n_features=2, n_samples_per_cluster=20, std=0.4
+):
+    prng = np.random.RandomState(seed)
+
+    # the data is voluntary shifted away from zero to check clustering
+    # algorithm robustness with regards to non centered data
+    means = (
+        np.array(
+            [
+                [1, 1, 1, 0],
+                [-1, -1, 0, 1],
+                [1, -1, 1, 1],
+                [-1, 1, 1, 0],
+            ]
+        )
+        + 10
+    )
+
+    X = np.empty((0, n_features))
+    for i in range(n_clusters):
+        X = np.r_[
+            X,
+            means[i][:n_features] + std * prng.randn(n_samples_per_cluster, n_features),
+        ]
+    return X