2180 search results for "map"

Because it’s Friday: 7 billion-person ‘continents’

October 19, 2012
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Because it’s Friday: 7 billion-person ‘continents’

The population of the world has been over 7 billion for about a year now. But those seven billion aren't distributed equally around the globe. 1.2 billion people — about in India alone (despite it havingjust 2% of the world's land area). At the other end of the spectrum, the entire continent of Australia houses about 0.3% of Australia....

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Venturing in text mining with ‘R’

October 19, 2012
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Background:Hello Friends, hope all of you are doing just great.  I decided to create my footprint in the blog space, it comes from my desire to share few very basic steps of text mining, with all of you.  I am neither a nerd, or statistician or an established data scientist and if you are one of them well,...

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Vendor news: TIBCO’s proprietary R runtime; Teradata’s appliance integrates R

October 17, 2012
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Vendor news: TIBCO’s proprietary R runtime; Teradata’s appliance integrates R

In a webinar today previewing Spotfire 5 (scheduled for release this November), TIBCO announced that it will include TERR: The Tibco Enterprise Runtime for R. TERR is a closed-source reimplementation of the R language engine, and not based on the GPL-licensed R project from the R Foundation. Here's the relevant slide from the webinar: By making the TERR engine...

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Rename photos’ names according to shooting time in a batch mode.

October 17, 2012
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For some reason, you want to know the shooting time of your photos. Generally, shooting time can be found as Date modified, if you didn’t made a lot of change to your photos. But, we often make change to our photos, such like copy them from a place to another, edit using Photoshop, Picasa, etc., and then, the Date...

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Twitter Analysis of the US Presidential Debate

October 17, 2012
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Twitter Analysis of the US Presidential Debate

The following are word clouds of tweets for each candidate from the October 16, 2012 debate with the bigger words the more often they were used in tweets (click on each word cloud to enlarge): And the net-negative posts for each candidate: Please note that the bigger the word is in the word cloud the

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The Shape of Floating Point Random Numbers

October 15, 2012
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The Shape of Floating Point Random Numbers

Over the weekend, Viral Shah updated Julia’s implementation of randn() to give a 20% speed boost. Because we all wanted to test that this speed-up had not come at the expense of the validity of Julia’s RNG system, I spent some time this

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Text Mining

October 15, 2012
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Text Mining

When it comes down to it R does a really good job handling structured data like matrices and data frames. However, its ability to work with unstructured data is still a work in progress. It can and it does handle text mining but the documentation is incomplete and the capabilities still don’t compare to other

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The movement of a drunk guy – Random Walk and exponential regression

October 13, 2012
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The movement of a drunk guy – Random Walk and exponential regression

I was in a party last night and a guy was totally drunk. Not just the guy who had a few drinks and speaks a bit too loud, but the one who is not very likely to remember what he has done during his night, but who is rather very likely to suffer from a h...

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Agreement between code readability ratings given by students

October 13, 2012
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Agreement between code readability ratings given by students

I have previously written about how we know nothing about code readability and questioned how the information content of expressions might be calculated. Buse and Weimer ran a very interesting experiment that asked subjects to rate short code snippets for readability (somebody please rerun this experiment using professional software developers). I’m interested in measuring how

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How to choose the right *apply function

October 13, 2012
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How to choose the right *apply function: This is an amazing stackoverflow answer to help you decide which of the many *apply functions (apply, lapply, sapply, vapply, mapply, rapply, tapply) is appropriate for the task at hand. I’m planning on doing...

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