1961 search results for "twitteR"

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 »

Matlab-style multiple assignment in R

August 26, 2010
By
Matlab-style multiple assignment in R

R again! You know how in Matlab you can do? S, I = sort(M) I like that. R generic functions makes this possible. First, let’s genericize assignment. I feel like regular “=” and “<-” oughta stay nongeneric, so let’s make … Continue reading →

Read more »

Oh (de)bugger!

August 26, 2010
By
Oh (de)bugger!

By number of questions asked, R passed MATLAB for the first time on Stack Overflow today. Thus it seems an appropriate time to write my first R-based post. This post concerns what to  do when your R-code goes pear shaped. Back in June there were a couple of very good videos on R debugging that

Read more »

Global Temperature Proxy Reconstructions ~ now with CO2 forcing

August 26, 2010
By
Global Temperature Proxy Reconstructions ~ now with CO2 forcing

Previously, I did a simple Bayesian projection of recent temperature using proxy data and the methods shown in McShane and Wyner (2010). I showed that when you take out the last 30 years of data (1969~1998), the projection does not track the recent uptick in temperatures well. The “projection” is a simple unparametric bootstrap which

Read more »

From igraph to network and back again

August 25, 2010
By
From igraph to network and back again

In an effort to achieve this (last paragraph), I created a couple of functions to coerce networks as ‘igraph’ objects to networks as ‘network’ objects and vice versa. I wrapped them into a package called ‘intergraph’ which I just uploaded to my personal miniCRAN. Please mind, this is still an experimental version! Might be bug-infested.

Read more »

R and Analytics: A good career choice

August 24, 2010
By

According to Microsoft, the hottest three new tech majors are: Data Mining/Machine Learning/AI/Natural Language Processing Business Intelligence/Competitive Intelligence Analytics/Statistics – specifically Web Analytics, A/B Testing and statistical analysis Tim O'Reilly concurs. Of course, R features prominently in most of these areas -- follow the links I added above for examples -- and is growing rapidly, so learning R makes...

Read more »

Packing everything into a data.frame

August 23, 2010
By
Packing everything into a data.frame

OK, I know I talk about R too much, but I like R, so I’m going to talk about it some more. Common situation: repeat a procedure many times; each time generates some large wadge of awful-structured data, and in … Continue reading →

Read more »

What’s for lunch? Private browsing.

August 23, 2010
By
What’s for lunch? Private browsing.

Over at the Mozilla Metrics blog, Mozillan Hamilton Ulmer uses R and ggplot2 to look at when people (or at least, Firefox users that volunteered to share their usage data) enable private browsing. Turns out it isn't just "porn mode" after all: the main use turns out to be lunchtime browsing away from the employer's prying eyes: Follow the...

Read more »