knnFeat.jl

Julia wrapper for knnFeat(https://github.com/upura/knnFeat)

Feature Extraction with KNN

Description

Julia implementation of feature extraction with KNN.

The following is R implementation: http://davpinto.com/fastknn/articles/knn-extraction.html#understanding-the-knn-features

The following is Python implementation: https://github.com/upura/knnFeat

Demo

Packages for visualization

using Gadfly

Data generation

x1 = rand(500) - 0.5
x2 = rand(500) - 0.5
X = [x1 x2]
y = 1 * ((x1 .* x2) .> 0)

Visualization

Feature extraction with KNN

include("knnFeat.jl")
newX = knnExtract(X, y, 1, 5)

Visualization

Reference

http://davpinto.com/fastknn/index.html

https://github.com/upura/knnFeat