Just back from the annual meetings, and it looks like there is a significant interest in collaborative R coding of soils-related algorithms and visualization. A new R-forge site has been created to host Algorithms for Quantitative Pedology. Public release of the 'soil' package should be ready in a couple weeks.
On Tuesday I will be speaking to the Bay Area R group about doing social network analysis in R with igraph. During the talk I will (hopefully) be doing some live SNA on the audience using R and generating data via Twitter. As a preview, or small taste for those not able
One of the most common and basic techniques for analyzing the relationships between variables is zero-order correlation. This tutorial will explore the ways in which R can be used to employ this method.Tutorial FilesBefore we start, you may want to dow...
The ggplot2 package can be used as an alternative to lattice for producing high quality graphics in R. The package provides a framework and hopefully simple interface to producing graphs and is inspired by the grammar of graphics. The main function for producing graphs in this package is qplot, which stands for quick plot. The first
Every year, I single out what I think are the Top Five open source projects. This year, there's only one hold-over from previous years, and it's likely that I'm just going to give it a Lifetime Achievement Award and pick five others next year. 5. NetBe...
I've been getting a bit of traffic from people searching for opentick (the defunct company), so I've started a list of similar (but non-free) data providers. I'm not affiliated with any of these vendors, and the list is in no particular order. I'll u...
Named rjson, appropriately. It’s quite basic just now, but contains methods for interconversion between R objects and JSON. Something like this:
> library(rjson)
> data <- list(a=1,b=2,c=3)
> json <- toJSON(data)
> json
"{\"a\":1,\"b\":2,\"c\":3}"
> cat(json, file="data.json")
Use cases? I wonder if RApache could be used to build an API that serves R data in JSON format?
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Well testing a bunch of samples for the largest population mean isn’t that common yet a simple test is at hand. Under the obvious title “The rank sum maximum test for the largest K population means” the test relies on the calculation of the sum of ranks under the combined sample of size , where 
With the recent update, I was able to get it working properly.Interestingly, while it works on my Vista 64-bit, it does not work on my Ubuntu 64-bit. I have no idea what is going on.
Samtools and its BioPerl wrapper Bio::DB:Sam prefer to give read coverage on a depth per base pair basis. This is typically an array of depths, one for every position that has at least one read aligned. OK, works for me. But how can we quickly see which targets (in my case transcripts) have the greatest total weighted read coverage...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
