2792 search results for "ggplot2"

The Awesome Parrondo’s Paradox

December 15, 2014
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The Awesome Parrondo’s Paradox

A technique succeeds in mathematical physics, not by a clever trick, or a happy accident, but because it expresses some aspect of physical truth (O. G. Sutton) Imagine three unbalanced coins: Coin 1: Probability of head=0.495 and probability of tail=0.505 Coin 2: Probability of head=0.745 and probability of tail=0.255 Coin 3: Probability of head=0.095 and … Continue reading...

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QQ-plots in R vs. SPSS – A look at the differences

December 15, 2014
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QQ-plots in R vs. SPSS – A look at the differences

We teach two software packages, R and SPSS, in Quantitative Methods 101 for psychology freshman at Bremen University (Germany). Sometimes confusion arises, when the software packages produce different results. This may be due to specifics in the implemention of a method or, as in most cases, to different default settings. One of these situations occurs

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Are high-reputation users quitting Stack Overflow?

December 14, 2014
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Are high-reputation users quitting Stack Overflow?

I spend a good amount of time on the programming Q+A site StackOverflow (and a smaller amount of time on its statistics sister site, Cross Validated). Recently this question on Meta Stack Overflow (the website’s discussion forum) caught my attention, raising the question of whether Stack Overflow had become “more negative” recently. It wasn’t the first...

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Monthly Weather in Netherlands

December 14, 2014
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Monthly Weather in Netherlands

When I downloaded the KNMI meteorological data, the intention was to do something which takes more than just the computers memory. While it is clearly not big data, at the very least 100 years of daily data is not small either. So I took along a load o...

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FOMC Dates – Price Data Exploration

December 14, 2014
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FOMC Dates – Price Data Exploration

As a first step in visualizing/exploring the data from my last post, FOMC Dates - Scraping Data From Web Pages, I’ll plot the FOMC announcement dates along with the following price series: 2-Year and 10-Year US Treasury yields, S&P500 ETF (SPY) and USD Index ETF (UUP).I’ll use the quantmod R package to download the price data from...

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ggRandomForests: Visually Exploring random forests. V1.1.1 release.

December 12, 2014
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ggRandomForests: Visually Exploring random forests. V1.1.1 release.

Release early and often. http://cran.r-project.org/web/packages/ggRandomForests/index.html I may have been aggressive numbering the first CRAN release at v1.0, but there’s no going back now. The design of the feature set is complete even if the code has some catching up to… Continue reading →

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Meetup: DataVis with Plotly on December 16th

December 12, 2014
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Plotly is a  web-based platform for making graphs and analyzing data. Plotly’s APIs and web app...

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Can pregnant women intuit the sex of their children?

December 11, 2014
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Can pregnant women intuit the sex of their children?

“So let’s start with the fact that the study had only 100 people, which isn’t nearly enough to be able to make any determinations like this. That’s very small power. Secondly, it was already split into two groups, and the two groups by the way have absolutely zero scientific basis. There is no theory that

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In case you missed it: November 2014 Roundup

December 11, 2014
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In case you missed them, here are some articles from November of particular interest to R users. Reviews of some of the R-related presentations (by John Chambers, Trevor Hastie and others) at the H20 World conference. An R/Shiny app for making egg-nog. An author's look at how R was used to create many of the beautiful graphics in the...

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Look! It’s your data!

December 10, 2014
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Look! It’s your data!

If a picture is worth a thousand words, then how many tables are a single visualization worth? Exploratory data analysis is a great way to see what is and is not in your dataset. I work in a hospital research… Continue reading →

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