Monthly Archives: May 2012

Mariano Rivera’s baseball prowess, illustrated with R

May 11, 2012
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Mariano Rivera’s baseball prowess, illustrated with R

Kevin Quealy, graphics editor at the New York Times, has published another fascinating behind-the-scenes look at how the Times creates data visualizations for print and online. In his latest post, he looks at how a visualization of the Yankee's Mariano Rivera performance compared to other Major League Baseball pitchers was created. (Detail below, click for the full image.) The...

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On the language of Mad Men

May 11, 2012
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Turns out that Megan would have never gotten a callback for an audition. (Via Ben Schmidt.)

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An embarrassing admission; Copy pasting tables with text containing spaces from Excel to R

May 11, 2012
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An embarrassing admission; Copy pasting tables with text containing spaces from Excel to R

I can’t believe I didn’t learn how to do it earlier, but I never knew how to accurately copy tables from excel that had text with spaces in them, and paste into a data frame in R without generating confusion … Continue reading →

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Porting cdplot to ggplot2

May 11, 2012
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Porting cdplot to ggplot2

Last week I published a post on plotting tables in ggplot2. So the next natural step is to port cdplot to allow simple visualization of categorical variables against a numerical predictor.First part of the story covers binary variables. In th...

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My day out at #osddmalaria

May 10, 2012
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My day out at #osddmalaria

Finally, I get around to telling you that… …on Friday 24th February, I took a day out from my regular job to attend a meeting on Open Source Drug Discovery for Malaria. I should state straight away that whilst drug discovery and chem(o)informatics are topics that I find very interesting, I have no professional experience

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90+ Two-Minute Videos on R

May 10, 2012
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I highly recommend Anthony Damico's excellent two-minute videos on programming in R. You can find the full list of 90+ videos here. This is the first of the series, which tells you how to download and install R:More generally, Anthony's video collectio...

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In case you missed it: April 2012 Roundup

May 10, 2012
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In case you missed them, here are some articles from April of particular interest to R users. Information Age published a feature article on R, describing how new graduates are driving adoption of R in industry. Bob Muenchen has updated his list of R package equivalents to SAS and SPSS procedures. A history of Data Science, including Bill Cleveland's...

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Discovering power laws and removing “shit”

May 10, 2012
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Discovering power laws and removing “shit”

Imagine you perform a statistical analysis on a time series of stock market data. After some transformation, averaging, and “renormalization” you find that the resulting quantity, let’s call it , behaves as a function of time like . Since you are a physicist you get excited because you have just discovered a power law. Physicists

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Survey of Data Science / Analytics / Big Data / Applied Stats / Machine Learning etc. Practitioners

May 10, 2012
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As I’ve discussed here before, there is a debate raging (ok, maybe not raging) about terms such as “data science”, “analytics”, “data mining”, and “big data”. What do they mean, how do they overlap, and perhaps most importantly, who are the people who work in these fields? Along with two other DC-area Data Scientists, Marck

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Simple Moving Average Strategy with a Volatility Filter: Follow-Up Part 3

May 10, 2012
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Simple Moving Average Strategy with a Volatility Filter: Follow-Up Part 3

In part 2, we saw that adding a volatility filter to a single instrument test did little to improve performance or risk adjusted returns. How will the volatility filter impact a multiple instrument portfolio? In part 3 of the follow up, I will evaluate the impact of the volatility filter on a multiple instrument test. … Continue reading...

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