On several occassions, R had suggested itself as a language for systems scripting. By this I mean random little adminstrative task such as (re-)moving or maybe renaming files or directories and the like. One of such cases just happened a few minutes ago. The aforementioned Garmin Forerunner 405 can cooperate ... [Read more...]

oday Romain Francois posted an interesting topic in the R-help list, and you can read his blog post for more details: celebrating R commit #50000. 50000 is certainly not a small number; we do owe R core members a big “thank you” for their great efforts in this fantastic statistical language in ... [Read more...]

Strict quality control procedures are extremely important for any genome-wide association study.  One of the first steps you should take when running QC on your GWAS is to look for related samples in your dataset.  This does two things for you.  First, you can get an idea of how many ... [Read more...]

pre{ font-size: x-small !important ; border: 1px solid black ; } Today, Brian Ripley commited the revision 50 000 into R svn repository. ------------------------------------------------------------------------ r50000 | ripley | 2009-10-09... [Read more...]

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Recently Microsoft Office Outlook 2007 started giving me the vague error message Outlook cannot open this item. The item may be damaged. The message would appear randomly throughout the day. Sometimes five error message boxes would be stacked up on top of each other. OK, but which item? What kind of ... [Read more...]

Deleting rows from a data frame in R is easy by combining simple operations. Let’s say you are working with the built-in data set airquality and need to remove rows where the ozona is NA (also called null, blank or missing). The method is a conce... [Read more...]

Hey again,I was looking for random things at google and I found such an interesting site: www.wordle.net, were you can put lots of words or the url of a blog (like this for example) and you get a cloud with the words you put and you can ... [Read more...]

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R is a great tool with lots of resources for genetics, genome-wide association studies, and many other biological applications.  We've covered several places to find help in R in the past, but if you're still apprehensive about diving into R's command-line interface, fear not.  The R commander is a graphical ... [Read more...]

A few weeks ago I needed to export a number of data frames to separate worksheets in an Excel file. Although one could output csv-files from R and then import them manually or with the help of VBA into Excel, I was after a more streamlined solution, as I would ... [Read more...]

If you ever work in Emacs with different files that all have the same name, this tip may be very useful for you. In my experience, this most often happens when working with Makefiles from multiple projects or directories. Assuming you have a buffer visiting a file called Makefile, by ... [Read more...]

OK in the last two tips I explained how functions can return functions and how to leverage expressions. Now lets get complicated. This is really how my testing code works; expressions embeded in expressions that are passed to functions that return fu... [Read more...]

I never really saw a use for these until I started testing code en mass. I found myself doing lots and lots of copy and paste. I heard it from Steve McConnell in his Code Complete book where he said if you are copying and pasting you are programming ... [Read more...]

I've been really busy lately working on my dissertation and applying for jobs. But I've found a few really cool things that I'd like to share. These are pretty complex things so lets break it up into a few tips. First Tip: did you know that you can re... [Read more...]

Recently, friend of my, got investment advise from his broker – long gas, because the price of gas is very low compared to oil. The broker didn’t indicate neither profit target or stop loss… I got hooked on the idea. First of all, I ran linear regression on monthly prices ... [Read more...]

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This post originally appeared on my Wordpress blog on October 4, 2009. I present it here in its original form. In order to honor the last day of the 2009 MLB regular season (excepting the Twins/Tigers tiebreaker Tuesday night), I was reading... [Read more...]

In order to honor the last day of the 2009 MLB regular season (excepting the Twins/Tigers tiebreaker Tuesday night), I was reading a book that combines a few of my favorite thing: statistics, R, and baseball. The book, by Joseph Adler, is called Baseball Hacks, and I highly recommend it ... [Read more...]