2128 search results for "twitter"

R is indispensable, because it’s reproducible

August 31, 2010
By

Maria Wolters, self-styled "Science-Mum of two" and speech and language technology researcher, has a great blog post about the one tool she couldn't live without: R. Maria says R is her "favourite tool for analysing experimental results and modelling the resulting patterns of behaviour and preferences", and explains why: R is a programming language for everything statistical. It’s free,...

Read more »

Namespaces and name conflicts

August 31, 2010
By
Namespaces and name conflicts

R packages ‘igraph’ and ‘network’ are good examples of two R packages providing similar but complementary functionalities for which there are a lot of name conflicts. As for now the ‘igraph’ package has a namespace while the ‘network’ package (version 1.4-1) does not. This became an issue when I was working on the ‘intergraph‘ package.

Read more »

Map colors

August 31, 2010
By
Map colors

Reader P was kind enough to make us a new color map so I promptly played around with it and other parameters. Need to figure out how to drop the labels and ticks on the “map”  map.axes() is no help. In anycase, I had a day long struggle with my R set up,  its all

Read more »

Hyper-g priors

August 30, 2010
By
Hyper-g priors

Earlier this month, Daniel Sabanés Bové and Leo Held posted a paper about g-priors on arXiv. While I glanced at it for a few minutes, I did not have the chance to get a proper look at it till last Sunday. The g-prior was first introduced by the late Arnold Zellner for (standard) linear models,

Read more »

Sweet bar chart o’ mine

August 30, 2010
By
Sweet bar chart o’ mine

Last week I was asked to visualise some heart rate data from an experiment. ... The standard way of displaying a time series (that is, a numeric variable that changes over time) is with a line plot. ... The experimenters, however, wanted a bar chart. I hadn't considered this use of a barchart before, so it was interesting...

Read more »

GEO database: curation lagging behind submission?

August 30, 2010
By
GEO database: curation lagging behind submission?

I was reading an old post that describes GEOmetadb, a downloadable database containing metadata from the GEO database. We had a brief discussion in the comments about the growth in GSE records (user-submitted) versus GDS records (curated datasets) over time. Below, some quick and dirty R code to examine the issue, using the Bioconductor GEOmetadb

Read more »

Beta translation done!

August 29, 2010
By
Beta translation done!

Once my team of four translators had handed back to me all the chapters of the French version of Introducing Monte Carlo Methods with R to me, I had to go over the book to ensure some minimal consistency between the chapters. I started the editing in the plane to Vancouver but did not get

Read more »

SST with Raster. Complete

August 29, 2010
By
SST with Raster. Complete

Update: new zip, correcting bug found by Steve  McIntyre: if(!file.exists(HadSST2ncdf)) downloadHADSST2() if(!file.exists(HadSST2ncdf)) downloadHadSST2() issue pending with another line as well. Checking raster versions. I’ve also, added some code into “downloadHadSST2″ that corrects for the “NA” problem with HadSST. (currently commented out). There is an issue with “ncdf” handling CF standards, which has been addressed in

Read more »

Subset views in R

August 28, 2010
By
Subset views in R

I don’t know how to do this in R. So let me just say why I can’t. I wanted something akin to Boost‘s sub-matrix views, where you can have indexes map back to the original matrix, so you don’t create … Continue reading →

Read more »

Because it’s Friday: How Machines Work

August 27, 2010
By
Because it’s Friday: How Machines Work

Ever wondered how a sewing machine seemingly manages to knot stitches without ever releasing the thread? Well, wonder no more: Find this and other animations of marvels of engineering, including the universal velocity joint and the rotary engine, at the link below. World Of Technology: Complicated Mechanisms Explained in simple animations (via) http://mytechnologyworld9.blogspot.com/2010/08/complicated-mechanisms-explained-in.html

Read more »