update

Author: Y1ran

Diff for: Deep_learning/Sigmoid.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Sat Aug 11 16:13:45 2018
+
+@author: Administrator
+"""
+
+# GRADED FUNCTION: sigmoid
+
+def sigmoid(z):
+    """
+    Compute the sigmoid of z
+
+    Arguments:
+    z -- A scalar or numpy array of any size.
+
+    Return:
+    s -- sigmoid(z)
+    """
+
+    ### START CODE HERE ### (≈ 1 line of code)
+    s = 1 / (1 + np.exp(-(z)))
+    ### END CODE HERE ###
+    
+    return s