Monthly Archives: September 2010

Problems with R

September 20, 2010
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Struggling for two whole days to do some not-terribly-advanced repeated-measures analysis of variance in R. Probably my worst experience with R so far and really an example of where R could do with some centralisation of effort. I have explo...

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Cricket – opinions and facts

September 20, 2010
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Cricket – opinions and facts

@zxaar's comments in a Cricinfo article prompted this post. He commented that - "He (Miandad) was not great outside of pakistan where he was helped by home umpires. Not a true great. Miadad's case states lie due to favour from umpires."I'm an Indian...

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R syntax highlighting for bloggers on WordPress.com

September 20, 2010
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R syntax highlighting for bloggers on WordPress.com

Announcing the ability to highlight R syntax in WordPress.com blogs, thanks to the recent work of Yihui Xie, Yoav Farhi and Andrew Redd.

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Data Mining in A Nutshell

September 20, 2010
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Data Mining in A Nutshell

# The following code may look rough, but simply paste into R or# a text editor (especially Notepad++) and it will look# much better.# PROGRAM NAME: MACHINE_LEARNING_R# DATE: 4/19/2010# AUTHOR : MATT BOGARD# PURPOSE: BASIC EXAMPLES OF MACHINE LEAR...

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R Code Examples

September 19, 2010
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R Code Examples

Data Mining in a Nutshell 'neuralnet'  neural network estimation and visualizationVisualizing Agricultural Subsidies by KY County R Code For googleVis  Data Visualization

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R Tutorial Series: Labeling Data Points on a Plot

September 19, 2010
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R Tutorial Series: Labeling Data Points on a Plot

There are times that labeling a plot's data points can be very useful, such as when conveying information in certain visuals or looking for patterns in our data. Fortunately, labeling the individual data points on a plot is a relatively simple process ...

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Why Use ProjectTemplate or Any Other Framework?

September 19, 2010
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We use frameworks like Ruby on Rails or ProjectTemplate to minimize the time we spend on irrelevant details. By definition, an irrelevant detail isn’t of interest to us. But how can we tell which details are irrelevant? This isn’t a trivial task and it seems to be, on the surface, a profoundly subjective matter. Thankfully,

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Response Times, The Exponential Distribution and Poisson Processes

September 18, 2010
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Response Times, The Exponential Distribution and Poisson Processes

I’m currently reading Luce’s “Response Times”. If you don’t know anything about response times, they are very easily defined: a response time is the length of time it takes a person to respond to a simple request, measured from the moment when the request is made to the moment when the person’s response is recorded.

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Elder Research Two Day Course

September 18, 2010
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... or what I did on my summer vacation...Just got back from the Elder Research Two Day Course "Tools for Discovering Patterns in Data".  It was a great course that (while not R specific) provides a great overview of Data Mining tools and tec...

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Using R

September 18, 2010
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Using R

By Matt BogardAbstractR is a statistical programming language with a command line interface that is becoming more and more popular every day. I have used R for data visualization, data mining/machine learning, as well as social network analysis. Initia...

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