Adding ref to machine learning coursera class

Author: olest

01-Simple-Linear-Regression/linreg.R

@@ -1,5 +1,5 @@
-x <- read.table("ex2x.dat")
-y <- read.table("ex2y.dat")
+x <- read.table("data/ex2x.dat")
+y <- read.table("data/ex2y.dat")
 
 ft <- lm(y[,1]~x[,1])
 ft

01-Simple-Linear-Regression/linreg.gradient.py

@@ -2,6 +2,7 @@
 
 import numpy as np
 
+# Implementation based on Ex. 1 in https://www.coursera.org/course/ml
 def gradDescent(x, y, theta, alpha, m, nIter):
     loss = 0
     for i in range(0, nIter):