changeset 2:1214c127fe43

steps towards logistic regression
author Jeff Hammel <k0scist@gmail.com>
date Wed, 30 Aug 2017 17:05:03 -0700
parents 92a402736bcc
children 14d65b83c299
files tvii/dot.py tvii/logistic_regression.py
diffstat 2 files changed, 13 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tvii/dot.py	Wed Aug 30 17:05:03 2017 -0700
@@ -0,0 +1,8 @@
+"""
+dot product
+"""
+
+def dot(w, x):
+    """inner dot product"""
+    
+    raise NotImplementedError('TODO')
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tvii/logistic_regression.py	Wed Aug 30 17:05:03 2017 -0700
@@ -0,0 +1,5 @@
+"""
+z = w'x + b
+a = sigmoid(z)
+L(a,y) = -(y*log(a) + (1-y)*log(1-a))
+"""