Posts

I am planning to finish school soon and I would like to shed some weight before moving on. I have collected a fair number of books that …
3 min read data, R, scrape

Time lapses are a fun way to quickly show a long period of time. They typically involve setting up your camera on a tripod and taking …
3 min read photography, R

Fangraphs recently published an interesting dataset that measures defensive efficiency of fielders. For each player, the Inside Edge …
7 min read statistics, data, baseball, R

Trevor Hastie and Rob Tibshirani are currently teaching a MOOC covering an introduction to statistical learning. I am very familiar …
2 min read statistics, data

In a previous post, I showed you how to scrape playlist data from Columbus, OH alternative rock station CD102.5. Since it's the end of …
3 min read shiny, data, ggplot, Visualization, R

CD1025’s Playlist and Summerfest Last time, I showed you how to download CD1025’s playlist back to last year and did some …
4 min read statistics, ggplot, Visualization, R

CD1025 is an “alternative” radio station here in Columbus. They are one of the few remaining radio stations that are independently …
5 min read data, exploratory data analysis, ggplot, Visualization, R

Note: I started this post way back when the NCAA men's basketball tournament was going on, but didn't finish it until now. Since the …
6 min read statistics, GAM, college basketball, ggplot, R

As a grad student, I do lots of searches for research related to my own. When I am off campus, a lot of the relevant results are not …
2 min read firefox, productivity

A lot of times we are given a data set in Excel format and we want to run a quick analysis using R's functionality to look at advanced …
4 min read data, R

The famous probabilist and statistician Persi Diaconis wrote an article not too long ago about the "Markov chain Monte Carlo (MCMC) …
8 min read statistics, ggplot, Visualization, Bayesian, optimization, R

Restricted Boltzmann Machines (RBMs) are an unsupervised learning method (like principal components). An RBM is a probabilistic and …
6 min read Deep Learning, ggplot, Visualization, machine learning, collaborative filtering, R

Factor Analysis of Baseball's Hall of Fame Voters body, td { font-family: sans-serif; background-color: white; font-size: 12px; margin: …
6 min read statistics, Hall of Fame, Visualization, baseball, Factor Analysis, R

With the election nearly upon us, I wanted to share an easy way I just found to download polling data and graph a few with ggplot2. …
3 min read Election, ggplot, Visualization, Polls, R

Finding the best subset of variables for a regression is a very common task in statistics and machine learning. There are statistical …
7 min read GAM, ggplot, Visualization, optimization, tabu search, R

Introduction Matrix factorization has been proven to be one of the best ways to do collaborative filtering. The most common example of …
6 min read libFM, baseball, collaborative filtering, Matrix Factorization

I have been toying around with Kaggle's Million Song Dataset Challenge recently because I have some interest in collaborative filtering …
2 min read data, MATLAB

Random forests ™ are great. They are one of the best "black-box" supervised learning methods. If you have lots of data and lots of …
7 min read statistics, Random forest, R

Forgive me if you are already aware of this, but I found it quite alarming. I know that most code is interpreted by the computer in …
6 min read MATLAB, R

I was having some fun with PITCHf/x data and generalize additive models. PITCHf/x keeps track of the trajectory, path, location of …
2 min read GAM, Visualization, baseball, R

Don't you hate it when you are running a long piece of code and you keep checking the results every 15 minutes, hoping it will finish? …
1 min read R

Recently, Chris Perez, the closer for the Indians, displayed some frustration with the fans for not supporting the team. Currently, …
3 min read Visualization, baseball, R

After signing a huge deal with the Angels, Pujols has been having a really bad year. He hasn't hit a home run this year, breaking a …
3 min read Bayesian, baseball, R

Correlation matrices are a common way to look at the dependence of a set of variables. When the variables have spatial relationships, …
3 min read Visualization, R

That title is quite a mouthful. This quarter, I have been reading papers on Spectral Clustering for a reading group. The basic goal of …
5 min read image segmentation, spectral clustering, R

I am a big fan of SAS's JMP software. It is the first statistical program I learned and I really like how the emphasize visualization. …
2 min read JMP, Visualization

I guess you could call this On Bayes Percentage. *cough* Fresh off learning Bayesian techniques in one of my classes last quarter, I …
5 min read Bayesian, baseball, R

Continuing my series of trying to figure out which team is best to pick for survival football and then ignoring it, I present my week 3 …
2 min read

So this is late, but I already did the analysis and I wanted to share my results for posterity. I used the same method as last time to …
3 min read

The NFL season is starting tomorrow night and I am in a survival league this year. If you are not familiar, in a survival league, each …
4 min read

If the past is a predictor of future performance, then there is about a 99.3% chance that I will stop updating this in 2 weeks. But you …
1 min read