2660 search results for "Ggplot2"

Unprincipled Component Analysis

February 10, 2014
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Unprincipled Component Analysis

As a data scientist I have seen variations of principal component analysis and factor analysis so often blindly misapplied and abused that I have come to think of the technique as unprincipled component analysis. PCA is a good technique often used to reduce sensitivity to overfitting. But this stated design intent leads many to (falsely) Related posts:

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Spatial autocorrelation of errors in JAGS

February 10, 2014
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Spatial autocorrelation of errors in JAGS

In the core of kriging, Generalized-Least Squares (GLS) and geostatistics lies the multivariate normal (MVN) distribution – a generalization of normal distribution to two or more dimensions, with the option of having non-independent variances (i.e. autocorrelation). In this post I will show: (i) how to use exponential decay and the … Continue reading →

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Cleaning Data and Graphing in R and Python

February 10, 2014
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Cleaning Data and Graphing in R and Python

Python has some pretty awesome data-manipulation and graphing capabilities. If you’re a heavy R-user who dabbles in Python like me, you might wonder what the equivalent commands are in Python for dataframe manipulation. Additionally, I was curious to see how … Continue reading →

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Sochi Olympic Medals

February 9, 2014
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Sochi Olympic Medals

For those who are addicted to R and haven’t the time to click the mouse on a web browser you too can still be informed about the results of the 2014 Sochi Winter Olympics. I was inspired by a SO … Continue reading →

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UofT R session went well. Thanks RStudio Server!

February 9, 2014
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UofT R session went well.  Thanks RStudio Server!

Apart from going longer than I had anticipated, very little of any significance went wrong during my R session at UofT on friday!  It took a while at the beginning for everyone to get set up.  Everyone was connecting to … Continue reading →

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Bayesian analysis of sensory profiling data, part 2

February 9, 2014
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Bayesian analysis of sensory profiling data, part 2

Last week I made the core of a Bayesian model for sensory profiling data. This week the extras need to be added. That is, there are a bunch of extra interactions and the error is dependent on panelists and descriptors.Note that where last week I pointe...

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R and the Weather

February 6, 2014
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R and the Weather

by Joseph Rickert The weather is on everybody's mind these days: too much ice and snow east of the Rockies and no rain to speak fo in California. Ram Narasimhan has made it a little easier for R users to keep track of what's going on and also get a historical perspective. His new R package weatherData makes it...

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Craig Bellamy – quite dplyr

February 4, 2014
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Craig Bellamy – quite dplyr

This weekend brought a couple of firsts in Cardiff’s winner against Norwich After a wretched time at Manchester United, Wilfried Zaha recorded his first Premiership assist, whilst, more interestingly, Craig Bellamy became the first player in history to score for seven different Premier League clubs To celebrate, I thought it was worth taking a quick

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R is 15th of top programming languages in latest RedMonk ranking

February 3, 2014
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R is 15th of top programming languages in latest RedMonk ranking

Analyst firm RedMonk periodically publishes rankings of the Top 20 programming languages, as measured by activity on StackOverflow and number of repositories on GitHub. In their most recent ranking (January 2014), R is ranked #15 amongst all programming languages. An impressive ranking for a domain-specific language; the top 3 were the general-purpose languages Java, Javascript and PHP. Here's a...

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Meticulously recreating bitmap plots in R

February 3, 2014
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Meticulously recreating bitmap plots in R

There’s a hard-fought drive on Wikimedia commons to convert those images that should be in vector format (i.e. graphs, diagrams) from their current bitmap form. At the time of writing, the relevant category has over 7000 images in the category … Continue reading →

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