The CDEC website provides access to a wide range in hydrologic data (stream flow, snow survey, etc.) collected in California. The following code and functions (attached at the bottom of the page) illustrate how to query CDEC, and graphically compare th... [Read more...]

Using TeXmacs as an interface for R (part 1)(This post was copied from my post at wordpress. Because I didn't manage to switch r-bloggers.com to use that blog, I'm reposting it here....) A nice, but not very well known, interface to R isTeXmacs. (I have to say that I ... [Read more...]

stargazer is a new R package that creates LaTeX code for well-formatted regression tables, with multiple models side-by-side, as well as for summary statistics tables. Its latest version, released in early January 2013, can also output the content of data …Read more » [Read more...]

My experience when starting out in R was trying to clean and recode data using for() loops, usually with a few if() statements in the loop as well, and finding the whole thing complicated and frustrating.In this post, I'll go over how you can avoi... [Read more...]

the hrs is the one and only longitudinal survey of american seniors.  with a panel starting its third decade, the current pool of respondents includes older folks who have been interviewed every two years as far back as 1992.  unlike cross-se... [Read more...]

As air pollution in Beijing reach new high [NYT article]. I re-ran the analysis I put online a few months ago. "Crazy bad" is a good description when it reach those levels. But I am sure there are other place like Mexico city, LA etc... that also look as dramatic ... [Read more...]

Restricted Boltzmann Machines (RBMs) are an unsupervised learning method (like principal components). An RBM is a probabilistic and undirected graphical model. They are becoming more popular in machine learning due to recent success in training them with contrastive divergence. They have been proven useful in collaborative filtering, being one of ... [Read more...]

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Last summer as a trainee I ran into a bit of trouble with the merge function in R. The main problem is that it's slower then your avarage tortoise in a tard field. Also I could not use rbind because of the different lengths of the frames. In code I ... [Read more...]

In his talk “Give Your Data A Listen” at last summer’s useR! 2012 conference, Eric Stone presented joint work with Jesse Garrison on audiolyzR, an R package for “data sonification.” I thought this was a nifty and well-executed idea. Since I haven’t seen … Continue reading → [Read more...]

Update for read.morphologika function. This code will be added to geomorph on our next package update. This update fixes problems with message "object 'incoords' not found". Can be used with example data set mydata_readmorphologika. Here, I p... [Read more...]

Mart Janssen writes me that he's tried to run the examples for BCEA and pointed out a problem $-$ it all boiled down to a missing script, really, but thanks Mart (if you're reading this)!I've now fixed the problem by updating the file Ut... [Read more...]

Fortunately, there is a page called www.opensubtitles.org, where you can get subtitle (.SRT) files for virtually every movie. Now let's see what we can do with these. SRT files are in plain text format (human readable) and can thus be read quite easily... [Read more...]

In the earlier post in this series I looked at the ordilabel() function to help tidy up ordination biplots in vegan. An alternative function vegan provides is orditorp(), the last four letters abbreviating the words text or points. That is … Continue reading → [Read more...]

Anyone who collects academic texts knows that the hobby can be a bit expensive.  Well, today I happened to notice that there is an incredible deal on Amazon's Gold Box Deal for today for many kindle academic books.  And they are not just unpo... [Read more...]

Last week on the radio I heard a story of southern Europeans and Irish looking for better times in northern Europe. I heard the tale of an Italian academic who left Italy to end up waiting tables in an Italian restaurant in the Netherlands. Obviously t... [Read more...]

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You can view the application online at http://trestletechnology.net:3838/rgl/! (Bear with us as we try out the very early release of Shiny Server. There may be some downtime and manual restarts of the service required in the next couple of weeks. Please drop us a line if it’... [Read more...]

In an earlier post I showed how to customise ordination diagrams produced by our vegan package for R through use of colours and plotting symbols. In a series of short posts I want to cover some of the options available … Continue reading → [Read more...]