Create README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>

numpy/roc/README.md

@@ -0,0 +1,54 @@
+# ROC
+{:.no_toc}
+
+<nav markdown="1" class="toc-class">
+* TOC
+{:toc}
+</nav>
+
+## Top
+
+Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
+
+## Test data
+
+```python
+import numpy as np
+import matplotlib.pyplot as plt
+
+rng = np.random.default_rng(1)
+
+a_x = rng.normal(1.5, 1.0, size=(5000))
+b_x = rng.normal(0.0, 1.0, size=(5000))
+
+
+ab_x = np.concatenate([a_x, b_x])
+edges = np.histogram_bin_edges(ab_x, bins=100, range=None, weights=None)
+
+h_a, _ = np.histogram(a_x, bins=edges)
+h_b, _ = np.histogram(b_x, bins=edges)
+
+h_a = h_a.astype(np.float32)
+h_b = h_b.astype(np.float32)
+
+h_a /= h_a.sum()
+h_b /= h_b.sum()
+
+edges = (edges[1:] + edges[:-1]) / 2.0
+
+plt.plot(edges, h_a, "c.", label="Class -1")
+plt.plot(edges, h_b, "m.", label="Class +1")
+plt.ylabel("Probability of a value")
+plt.ylabel("Edge center")
+plt.legend()
+plt.show()
+```
+
+!(Image1)[image1.png]
+
+```python
+```
+
+
+```shell
+```