1831 search results for "ggplot2"

Shorting Mebane Faber

July 19, 2011
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Shorting Mebane Faber

Although I do not personally know Mebane Faber, I know enough that I do not want to short him. However, I thought it would be insightful to see how the short side of his “A Quantitative Approach To Tactical Asset Allocation” might look.  Once ...

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Correlation Resources: SPSS, R, Causality, Interpretation, and APA Style Reporting

July 17, 2011
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This post provides links to a range of resources related to the use and interpretation of correlations. I wanted to provide a page with links to a number of additional resources that would be useful both for those of my students who might be keen to le...

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Migrating from SPSS/Excel to R, Part 2: Working with Packages

July 17, 2011
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Migrating from SPSS/Excel to R, Part 2: Working with Packages

In this post, I cover an important aspect of using R that users of SPSS/Excel won’t be familiar with: working …Continue reading »

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Slopegraphs in R

July 16, 2011
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Slopegraphs in R

The internet seems abuzz this week with the "discovery" of a long-lost Edward Tufte plot type: the slopegraph. In this post, I'll show you how to create these elegant compact plots using R and ggplot2.

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Plotting git statistics

July 13, 2011
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Plotting git statistics

Here’s a funny story – friend of my, avid gamer at that time, was going downhill on a bicycle when wonderful idea flashed his mind: I need to save the current status… Just in case if I crash, I will start again from the top of the hill. If you are a developer (quantitative or

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R at Wikimedia

July 9, 2011
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Last year Wikipedia rolled out a pilot program to use Wikipedia article creation as an assignment in the classroom. Students wrote articles on a topic area and rather than turning them into a professor and forgetting about it they upload it to Wikipedia and expose it to readers around the world. 24 schools inside the…

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Scary Derivatives and Scary XML in R

July 7, 2011
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Scary Derivatives and Scary XML in R

I need some new R skills, and there is no better motivation to learn XML in R than one of the scariest financial datasets out there—the US Department of the Treasury Office of the Comptroller of the Currency (OCC) Quarterly Derivatives Report. I’ll...

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Things I would tell a budding bioinformatician to learn.

July 7, 2011
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I recently read Ewan Birney's blog post, which I found echoed a lot of my own thoughts about the use of statistical in computational biology. I thought I would compile my own similar list but for bioinformatics  / computational biology in general. I have not been and in the field as long as Ewan and I certainly still...

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Artificial intelligence in trading: k-means clustering

July 6, 2011
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Artificial intelligence in trading: k-means clustering

There is many flavors of artificial intelligence (AI), however I want to show practical example of the cluster analysis. It is very applicable in finance. For example, one of stylized facts of volatility is, that it moves in clusters, meaning that today’s volatility will be more likely as yesterday’s volatility. To gauge these moves you

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slides from my R tutorial on Twitter text mining #rstats

July 4, 2011
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slides from my R tutorial on Twitter text mining #rstats

Update: An expanded version of this tutorial will appear in the new Elsevier book Practical Text Mining and Statistical Analysis for Non-structured Text Data Applications by Gary Miner et. al which is now available for pre-order from Amazon. In conjunction with the book, I have cleaned up the tutorial code and published it on github.

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