Toru Urakawa toruurakawa

Quick List of Resources for Topological Data Analysis with Emphasis on Machine Learning

This is just a quick list of resourses on TDA that I put together for @rickasaurus after he was asking for links to papers, books, etc on Twitter and is by no means an exhaustive list.

Survey Papers

Both Carlsson's and Ghrist's survey papers offer a very good introduction to the subject

Topology and Data by Gunnar Carlsson
Barcodes: The Persistent Topology of Data by Robert Ghrist

Other Papers and Web Resources

Extracting insights from the shape of complex data using topology A good introductory paper in Nature on the Mapper algorithm.

do androids dream of cooking?

The following recipes are sampled from a trained neural net. You can find the repo to train your own neural net here: https://github.com/karpathy/char-rnn Thanks to Andrej Karpathy for the great code! It's really easy to setup.

The recipes I used for training the char-rnn are from a recipe collection called ffts.com And here is the actual zipped data (uncompressed ~35 MB) I used for training. The ZIP is also archived @ archive.org in case the original links becomes invalid in the future.

Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

つづきはこちらで http://akkunchoi.github.com/git-ref.html

Git

基本（とりあえずこれ覚えればOK）

$ git init hoge # git リポジトリを作成。または...

	#import <UIKit/UIKit.h>
	#import <ImageIO/ImageIO.h>
	#import <MobileCoreServices/MobileCoreServices.h>

	static UIImage *frameImage(CGSize size, CGFloat radians) {
	UIGraphicsBeginImageContextWithOptions(size, YES, 1); {
	[[UIColor whiteColor] setFill];
	UIRectFill(CGRectInfinite);
	CGContextRef gc = UIGraphicsGetCurrentContext();
	CGContextTranslateCTM(gc, size.width / 2, size.height / 2);

	// バックグラウンド処理のスタートを宣言
	UIBackgroundTaskIdentifier bgTask = UIBackgroundTaskInvalid;
	bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
	[[UIApplication sharedApplication] endBackgroundTask:bgTask];
	}];

	/* ここでやりたい処理をする */

	// バックグラウンド処理の終了
	if (bgTask != UIBackgroundTaskInvalid){

	#import <QuartzCore/QuartzCore.h>


	@implementation UIView (UIView_RoundCorner)

	- (void) setCornersRoundedWithRadius: (float) cornerRadius
	{
	UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect: self.bounds
	byRoundingCorners: UIRectCornerAllCorners
	cornerRadii: CGSizeMake(cornerRadius, cornerRadius)];

	// http://stackoverflow.com/questions/8400340/determining-3g-vs-edge

	- (NSNumber *) dataNetworkTypeFromStatusBar {

	UIApplication *app = [UIApplication sharedApplication];
	NSArray *subviews = [[[app valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
	NSNumber *dataNetworkItemView = nil;

	for (id subview in subviews) {
	if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {