Indexed the Linear Regression article in the main read.me file. Also made a code style change.

Author: kelvinlauKL

Linear Regression/LinearRegression.playground/Contents.swift

@@ -13,12 +13,12 @@ func predictedCarPrice(carAge: Double) -> Double {
 
 // An iterative approach
 
-let numberOfCarAdvertsWeSaw = carPrice.count - 1
+let numberOfCarAdvertsWeSaw = carPrice.count
 let numberOfIterations = 100
 let alpha = 0.0001
 
 for n in 1...numberOfIterations {
-    for i in 0...numberOfCarAdvertsWeSaw {
+    for i in 0..<numberOfCarAdvertsWeSaw {
         let difference = carPrice[i] - predictedCarPrice(carAge[i])
         intercept += alpha * difference
         slope += alpha * difference * carAge[i]

README.markdown

@@ -104,7 +104,7 @@ Bad sorting algorithms (don't use these!):
 
 - [k-Means Clustering](K-Means/). Unsupervised classifier that partitions data into *k* clusters.
 - k-Nearest Neighbors
-- Linear Regression
+- [Linear Regression](Linear Regression/)
 - Logistic Regression
 - Neural Networks
 - PageRank