# William Gurtler

## 397 Flips | 2 Magazines | 2 Likes | 1 Following | 839 Followers | @whdgurtler | Keep up with William Gurtler on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “William Gurtler”

### Matrix factorization

(This article was first published on <b>sane.a.lytics » R</b>, and kindly contributed to R-bloggers)<p>Or fancy words that mean very simple things.<p>At the heart …

Data Science### The Analytics Edge – Learn Data Analytics from MIT, Free on edX

In the last decade, the amount of data available to organizations has reached unprecedented levels. Data is transforming business, social interactions, and the future of our society. In this course, you will learn how to use data and analytics to give an edge to your career and your life. We will …

Data Science### Why I Left My Data Science Master's Program

I just completed the second of two finals to end the first semester of Berkeley's MIDS program--a new data science program created by the School of …

### The Math Problem Behind Ranking The Top 10 GOP Candidates

Sixteen presidential candidates talking over each other doesn't sound much like good TV. CNN and Fox News know this, so when they air their Republican debates later this year, they'll both limit the field to 10 candidates.<p>Both networks will use polling data to limit the field to only the 10 most …

Government### Applied Statistics Is A Way Of Thinking, Not Just A Toolbox

<b>By Randy Bartlett, Blue Sigma Analytics.</b><p>Applied statistics provides our way of thinking and our approach to extracting the most information from …

Data Science### Cheryl's birthday puzzle part two, Denise's revenge - can you solve it?

Exclusive: all was well with Albert, Bernard and Cheryl until Denise showed up ... that’s right, it’s another birthday brainteaser from Singapore<p>How to solve it! Cheryl’s birthday puzzle part two: Denise’s revenge<p>Welcome to the first of my new puzzle series. Every second Monday I’ll be posting some …

Mathematics### Plotly: Online Dashboards That Update Your Data and Graphs

By Matt Sundquist, Plotly.<p>If you track events that change--temperature, stock prices, or sales--you need the most recent data. Typical options are: …

### R, Python, MATLAB, & Excel Dashboards & Graphs with D3.js & WebGL

(This article was first published on <b> Modern Data » R</b>, and kindly contributed to R-bloggers)Web tools like D3.js and WebGL let you make beautiful, …

Data Visualization### A simple explanation of rejection sampling in R

(This article was first published on <b>theoretical ecology » Submitted to R-bloggers</b>, and kindly contributed to R-bloggers)<p>The central quantity in …

### How to Create Beautifully Detailed Maps Using Twitter Data

With over 6 billion tweets, you, too, can be a digital cartographer.<p>Using the geotagging data from from Twitter’s public API, data artist and “map geek,” Eric Fischer created the most detailed tweet map ever. With the help of his Mapbox article that outlines both his creative process and the tools …

### Genetic optimization for Trading Strategies using Rapidminer and R

(This article was first published on <b>a Physicist in Wall Street</b>, and kindly contributed to R-bloggers)<p>That is the second tutorial of Rapidminer and R …

### Tools for Rcpp

Categories: RStudio IDE<p>Over the past several years the Rcpp package has become an indispensable tool for creating high-performance R code. Its power …

### Scraping Web Pages With R

(This article was first published on <b>OUseful.Info, the blog... » Rstats</b>, and kindly contributed to R-bloggers)<p>One of the things I tend to avoid doing …

R Language### The Problem with Propensity Scores

(This article was first published on <b>jacobsimmering.com</b>, and kindly contributed to R-bloggers)<p>Are Propensity Scores Useful?<p>Effect estimation for …

### Python and R: Basic Sampling Problem

In this post, I would like to share a simple problem about sampling analysis. And I will demonstrate how to solve this using Python and R. The first …

### Single-Layer Neural Networks and Gradient Descent

This article offers a brief glimpse of the history and basic concepts of machine learning. We will take a look at the first algorithmically described …

Deep Learning### The Curse of Dimensionality and the Autoencoder

Let's say you're working on a cool image processing project, and your goal is to build an algorithm that analyzes faces for emotions. It takes in a …

Machine Learning### Supervised Classification, beyond the logistic

In our data-science class, after discussing limitations of the logistic regression, e.g. the fact that the decision boundary line was a straight …

Logistic Regression### How To Be Data Scientists That Works In Field X

You want to combine your experience in your current professions (called field X) for this article, with your rapidly increasing knowledge of data …

Data Science### In ML, What They Know Can Hurt You

<i>This blog post is authored by Juan M. Lavista, Principal Data Scientist at Microsoft.</i><p>Imagine you own a restaurant in a city (any city but <i>not</i> …

### Mathematical Habits of Mind

Our classrooms are full of them. We teachers are pros when it comes to employing and modeling good habits and routines that enable us to manage and …

### Cause And Effect: The Revolutionary New Statistical Test That Can Tease Them Apart

Statisticians have always thought it impossible to tell cause and effect apart using observational data. Not any more.<p>One of the most commonly …

### Misleading With Statistics

How journalists make arguments with distorted data<p>When I was a kid, I remember reading an issue of Mad Magazine that had a gag about statistics. They …

### Hadoop gets native R programming for big data analysis

Sensing a growing interest in big data-style analysis, software provider Revolution Analytics has updated its flagship package of R statistical …

Big Data### How to perform a fuzzy match using SAS functions

“Here’s Johnny!!!” and well sometimes John and sometimes Jonathan and sometimes Jon.<p>In the real world, you sometimes need to make matching character …

Data Science