971 search results for "how to import image file to r"

Postdoc on adaptive MCMC in Paris

May 2, 2011
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Postdoc on adaptive MCMC in Paris

Although the official deadline is long past, I just became aware of this call for a postdoctoral position in Paris starting next Fall. Please feel free to apply: Summary Adaptive Markov Chain Monte Carlo (MCMC) methods are currently a very active field of research. MCMC methods are sampling methods, based on Markov Chains which are

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RStudio is good for you

April 29, 2011
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RStudio is good for you

I was recently introduced to RStudio, a new integrated development environment for R, it is just amazing! It is free, and open, compatible with PC/Mac/Linux OSs. You can also choose to run it in the cloud, and access it from your favorite web browser. As you can see, the window divides into four in a

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4 lines of R to get you started using the Rook web server interface

April 25, 2011
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4 lines of R to get you started using the Rook web server interface

Jeffrey Horner's new Rook package provides a new interface for developing R-based web applications. Rook allows the same application to run in R's built-in web server or (soon) in the rApache module. This post shows how easy it is to use the package's Rhttpd class to get started with Rook.

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How to load your iPhone location data into R

April 22, 2011
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How to load your iPhone location data into R

Earlier this week, data scientists Pete Warden and Alasdair Allen reported that iPhones and cell-enabled iPads keep an internal log of the devices location, which is accessible from the backup that iTunes creates when you sync the device. (Update Apr 27: Apple responds that the locations are those of nearby cell towers and wi-fi hotspots, not the device itself.)...

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Weight compared to risk fraction

April 18, 2011
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Weight compared to risk fraction

How well do asset weight constraints constrain risk? The setup In “Unproxying weight constraints” I claimed that many constraints on asset weights are really a proxy for constraining risk. That is not a problem if weights are a good proxy for risk.  So the question is: how good of a proxy are they? To give … Continue reading...

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Exporting R graphics as LaTeX code – version 0.6.1 of the tikzDevice package is out

April 17, 2011
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(Guest post on R-bloggers by Charlie Sharpsteen) Cameron and I are pleased to announce version 0.6.0 of the tikzDevice package which should be available shortly at your local CRAN mirror! The tikzDevice makes it possible to export R graphics as LaTeX code that can be included in other documents or compiled into stand alone figures. The full power of...

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Article about plyr published in JSS, and the citation was added to the new plyr (version 1.5)

April 11, 2011
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Article about plyr published in JSS, and the citation was added to the new plyr (version 1.5)

The plyr package (by Hadley Wickham) is one of the few R packages for which I can claim to have used for all of my statistical projects. So whenever a new version of plyr comes out I tend to be excited about it (as was when version 1.2 came out with support for parallel processing)

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Fast Two Way Sync in Ubuntu!

April 9, 2011
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Fast Two Way Sync in Ubuntu!

I love the portability of a laptop. I have a 45 min train ride twice a day and I fly a little too, so having my work with me on my laptop is very important. But I hate doing long running analytics on my laptop when I’m in the office because it bogs down my

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Example 8.33: Merging data sets one-to-many

April 5, 2011
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Example 8.33: Merging data sets one-to-many

It's often necessary to combine data from two data sets for further analysis. Such merging can be one-to-one, many-to-one, and many-to-many. The most common form is the one-to-one match, which we cover in section 1.5.7. Today we look at a one-to-man...

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Comparison of compression

April 4, 2011
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Comparison of compression

I recently wrote an email with an attached LZMA archive. It was immediately answered with something like: "What are you doing? I had to boot linux to open the file!" First of all I don't care whether user of proprietary systems are able to read open formats, but this answer made me curious to know about the differences between some compression...

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