Monthly Archives: February 2011

Create a Web Crawler in R

February 8, 2011
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Admittedly I am not the best R coder, and I certainly have a lot to learn, but the code at the link below should provide you with an example of how easy it is to create a very (repeat: very) basic web crawler in R.  If you wanted to do this in SPSS, and I

Opinions Not Backed by Money Are Not That Believable–Updated and with R

February 8, 2011
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As an update to http://timelyportfolio.blogspot.com/2010/12/opinions-not-backed-with-money-are-not.html, I have updated the revised data, added the past two months, and translated to R. If the world really is overly bullish on stocks as some suggest, I...

Ubuntu – Installing R and RGedit Plugin

February 8, 2011
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R is a fantastic bit of software which I have been using on and off for a number of years since I gave up on SAS due to their (free for academics) annoying licenses and limited support for the things I wanted to do – R is infinitely flexible and totally free. Installing R on

Utilizing multiple cores in R

February 8, 2011
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There are a couple of options in R, if you want to utilize multiple cores on your machine. These days my favorite is doMC package, which depends on foreach and multicore packages.in the section below squareroot for each number is calculated in parallel...

Utilizing multiple cores in R

February 8, 2011
By

There are a couple of options in R, if you want to utilize multiple cores on your machine. These days my favorite is doMC package, which depends on foreach and multicore packages.in the section below squareroot for each number is calculated in parallel...

February 8, 2011
By

sqldf and grouping rows in R

February 8, 2011
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In R, you can treat tables (or data.frames as they are called in R) as SQL tables. That means you can query them as you would query a database with SQL commands. This is particularly useful 1) if you know SQL, hahah:)  2) if you have large tabl...

sqldf and grouping rows in R

February 8, 2011
By

In R, you can treat tables (or data.frames as they are called in R) as SQL tables. That means you can query them as you would query a database with SQL commands. This is particularly useful 1) if you know SQL, hahah:)  2) if you have large tabl...