3097 search results for "GIS"

What Is the Probability of a 16 Seed Beating a 1 Seed?

April 20, 2013
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What Is the Probability of a 16 Seed Beating a 1 Seed?

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 NCAA Men's Basketball Tournament has moved to 64 teams, a 16 seed as never upset a 1 seed. You might be tempted to say...

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R: Streets of France

April 19, 2013
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R: Streets of France

I was Inspired from Ben Frys all Streets project. There he plotted all streets of the United States of America (about 240 million segments). I tried this first for the countries in Europe, France has about 22 million segments, with the goal to get an all street map of Europe. My data source originate from the OpenStreetMap project and was...

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Using multilevel models to get accurate inferences for repeated measures ANOVA designs

April 18, 2013
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Using multilevel models to get accurate inferences for repeated measures ANOVA designs

It is now increasingly common for experimental psychologists (among others) to use multilevel models (also known as linear mixed models) to analyze data that used to be shoe-horned into a repeated measures ANOVA design. Chapter 18 of Serious Stats introduces multilevel models by considering them as an extension of repeated measures ANOVA models that can

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Using multilevel models to get accurate inferences for repeated measures ANOVA designs

April 18, 2013
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Using multilevel models to get accurate inferences for repeated measures ANOVA designs

It is now increasingly common for experimental psychologists (among others) to use multilevel models (also known as linear mixed models) to analyze data that used to be shoe-horned into a repeated measures ANOVA design. Chapter 18 of Serious Stats introduces multilevel models by considering them as an extension of repeated measures ANOVA models that can

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Cut Dates Into Quarters

April 18, 2013
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Frequently I need to recode a date column to quarters. For example, at Excelsior College we have continuous enrollment so we report new enrollments per quarter. To complicate things a bit, our fiscal year starts in July so that July, August, and September represent the first quarter, January, February, and March are actually the third quarter. But sometimes...

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ggplot dodged vs faceted bar chart

April 17, 2013
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ggplot dodged vs faceted bar chart

I've been bowling once per year at a charity event for the last few years and have kept track of the outcomes to share my group. I used ggplot2 to create a bar chart for the scores. Below are two graphs, one is dodged, the other is faceted. There's no ...

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Version 1.2 of devtools released

April 17, 2013
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Version 1.2 of devtools released

We’re very pleased to announce the release of devtools 1.2. This version continues to make working with packages easier by increasing installation speed (skipping the build step unless local = FALSE), enhancing vignette handling (to support the non-Sweave vignettes available in R 3.0.0), and providing better default compiler flags for C and C++ code. Also

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Intro R training from RStudio: NYC May 13-14, SF May 20-21 (and discounts)

April 17, 2013
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At RStudio, we’re hosting our Introduction to R Workshop this May in two locations. As an R-help subscriber, we’re offering 10% off! Intro to data science with R (http://goo.gl/bplg3)   May 13-14 New York City Intro to data science with R (http://goo.gl/VCUFL)  May 20-21 San Francisco Bay Area What will you learn? Practical skills for visualizing, transforming, and modeling data in R....

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Interview with a forced convert from Matlab to R

April 17, 2013
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Interview with a forced convert from Matlab to R

Here is an interview with Ron Hochreiter, Assistant Professor at WU Vienna University Economics and Business. In 25 words or less tell us what you do (using German words is cheating). I consider myself as a data scientist (teaching and research) with roots in Mathematical Programming, i.e. Optimization under Uncertainty (Stochastic Programming). You were an The post Interview...

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Reinhart & Rogoff: Everyone makes coding mistakes, we need to make it easy to find them + Graphing uncertainty

April 17, 2013
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Reinhart & Rogoff: Everyone makes coding mistakes, we need to make it easy to find them + Graphing uncertainty

You may have already seen a lot written on the replication of Reinhart & Rogoff’s (R &amp R) much cited 2010 paper done by Herndon, Ash, and Pollin. If you haven’t, here is a round up of some of some of what has been written: Konczal, Yglesias, Krugman, Cowen, Peng,

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