Monthly Archives: December 2012

Modis QC Bits

December 5, 2012
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Modis QC Bits

In the course of working through my MODIS  LST project and reviewing the steps that Imhoff and Zhang took as well has the data preparations other researchers have taken ( Neteler ) the issue of MODIS Quality control bits came up.  Every MODIS  HDF file comes with multiple SDS or multiple layers of data. For

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Function Closures and S4 Methods

December 4, 2012
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Function Closures and S4 Methods

This brief tutorial illustrates how to combine S4 object oriented capabilities with function closures in order to develop classes with built in methods. Thanks to Hadley Wickham for the great contribution of material and tutorials made available on the web and to Bill Venables and Stefano Iacus for their kind reviews. Regular … Continue reading →

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Plotting Likert Scales

December 4, 2012
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Plotting Likert Scales

Graphs can provide an excellent way to emphasize a point and to quickly and efficiently show important information. Sadly, poor graphs can be a good way to waste space in an article, take up time in a presentation, and waste a lot of ink all while providing little to no information. Excel has made it

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Shiny Server – Earthshattering News

December 4, 2012
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Shiny Server – Earthshattering News

As you probably know, I am one of the strongest proponents of the Shiny package for developing interactive web applications Amongst the latest news from RStudio is that what was planned to be commercial software will now be free and Open Source (AGPLv3 license) To celebrate this momentous announcement, I have produced an Earthquake app.

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Amazon associates links (warnin’)

December 4, 2012
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Amazon associates links (warnin’)

As in previous years, let me warn unwary readers that the links to Amazon.com and Amazon.fr found on this blog are actually susceptible to earn me a monetary gain if a purchase is made in the 24 hours following the entry on Amazon through this link, thanks to the “Amazon Services

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Big Data Trees with Hadoop HDFS

December 4, 2012
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Last month's release of Revolution R Enterprise 6.1 added the capability to fit decision and regresson trees on large data sets (using a new parallel external memory algorithm included in the RevoScaleR package). It also introduced the possibility of applying this and the other big-data statistical methods of RevoScaleR to data files distributed in in Hadoop's HDFS file system*,...

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Finding a pin in a haystack – PCA image filtering

December 4, 2012
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Finding a pin in a haystack – PCA image filtering

I found the following post regarding the anomalous metal object observed in a Curiosity Rover photo to be fascinating - specifically, the clever ways that some programmers used for filtering the image for the object. The following answer on mathematica.stackexchange.com was especially illuminating for its use of a multivariate distribution to...

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My Job Just Got Shiny-er

December 4, 2012
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My Job Just Got Shiny-er

Today I went to the RStudio site to post a feature request.  I noticed up in the top navigation a link called "Shiny".  I like things that are shiny.  It turns out Shiny is a new package the RStudio team has developed for easily making r...

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Climate: Misspecified

December 4, 2012
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Climate: Misspecified

I'm usually quite a big fan of the content syndicated on R-Bloggers (as this post is), but I came across a post yesterday that was as statistically misguided as it was provocative. In this post, entitled "The Surprisingly Weak Case for Global Warming," the author (Matt Asher) claims that the trend toward hotter average global temperatures over the last

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An update on Shiny

December 4, 2012
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An update on Shiny

Last month we released Shiny, our new R package for creating interactive web applications. The response from the community has been extremely encouraging–we’ve received a lot of great feedback that has helped us to make significant improvements to the framework already! Shiny 0.2.3 on CRAN Starting with Shiny 0.2.3, you can install the latest stable

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