Monthly Archives: August 2010

Integrating R and Gedit

August 2, 2010
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Here is how to integrate R and Gedit using Rgedit plugin.

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useR! 2010 – Local R User Group Panel

August 2, 2010
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useR! 2010 – Local R User Group Panel

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Advanced debugging techniques in R

August 2, 2010
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Advanced debugging techniques in R

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Map-reduce in R with Amazon EMR

August 2, 2010
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Map-reduce in R with Amazon EMR

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On the Palin effect

August 2, 2010
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Do Vice-Presidential candidates have any effect on the outcome of Presidential elections in the US? Some past research suggested their impact was negligible, but the 2008 election seems to have changed all that, at least in the case Sarah Palin. As reported on the Everyday Politics blog, a new paper (co-authored by Revolution Analytics' CEO Norman Nie) looks at...

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Summer hiatus

August 2, 2010
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Summer hiatus

We're taking a break from posting for most of August. We'll be back in a month with new examples, including R- and SAS-applicable tricks and tools.Please drop us any ideas in the comments or by e-mail. We love feedback of any kind.

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JSM 2010 [day 1]

August 2, 2010
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JSM 2010 [day 1]

The first day at JSM is always a bit sluggish, as people slowly drip in and get their bearings. Similar to last year in Washington D.C., the meeting takes place in a huge conference centre and thus there is no feeling of overcrowded . It may also be that the peripheric and foreign location

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Summary plots

August 2, 2010
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Summary plots

So, when you first look at some data, it’s helpful to get a feel of it. One way to do this is to do a plot or two. I’ve found myself continuously doing the same series of plots for different datasets, so in the end I wrote this short code to put all the plots

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Using xBalance with MatchIt

August 1, 2010
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In a previous post, I demonstrated how to create a propensity score matching, test balance, and analyze the outcome variable using the optmatch and RItools packages. The same strategy can be used with other matching algorithms, for example the various methods included in the MatchIt package. I’ll use the same basic question and data from my previous...

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Margin Constraints with LSPM

August 1, 2010
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Margin Constraints with LSPM

When optimizing leverage space portfolios, I frequently run into the issue of one or more f$ (/f) being less than the margin of its respective instrument.  For example, assume the required margin for an instrument is $500, f$ is $100, an...

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