Update: Some are not aware that GISS has switched to using Nightlights in the ROW. According to their updates they have moved to nightlights for the ROW. The station inventories can be found here The station I examine below is listed  like this in the new giss inventory 20551495001 TURPAN 42.92 91.00 24 384R ... [Read more...]

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This post is not about R (for a change). For working UK scientists, science is vital – sign the on-line petition to preserve science funding. For my contribution of what we don’t know yet - We don’t know whether we can use biomarkers of kidney injury to personalise the ... [Read more...]

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The other day I was asked by a coworker hos to do a SAS Means By statement in R. I embarrassingly did not know how to so I wrote something up, and this is what I came up with, it takes a data.frame and an indexing variable and computes ... [Read more...]

There is often confusion about how to include covariates in ARIMA models, and the presentation of the subject in various textbooks and in R help files has not helped the confusion. So I thought I’d give my take on the issue. To keep it simple, I will only describe ... [Read more...]

Hmm, lets see how a fusion table works with map maker. The process works like this. We read in the GHCN inventory file into R. ( see code below ) We then clean it up ( the names fields and missing values) and we output it to a  *csv  file. Then open the ... [Read more...]

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Time for another dump of the entire package. Get the zip file 5.1 in the box to the right. ( shortly). unzip and run the following files if you havent already: 1. downloadall.R 2. setup.R If you are running for the first time, You’ll note I added diagnostics. Sometimes the files ... [Read more...]

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I am often asked how to fit an ARIMA or ETS model with data having a long seasonal period such as 365 for daily data or 48 for half-hourly data. Generally, seasonal versions of ARIMA and ETS models are designed for shorter periods such as 12 for monthly data or 4 for quarterly data. ... [Read more...]

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After some e-mails I decided to put together a bit more detailed instruction how to install the ‘intergraph’ package together with the namespaced version of the ‘network’ package. See here. There seemed to be some problems with downloading the namespaced ‘network’ from my webstite (thanks Neil!). File permissions were set ... [Read more...]

A while back Steve Mcintyre was looking for a way to handle .Z files in R Ron Broberg over at the whiteboard had an approach that steve adopted both for untar and for uncompressing .Z files.  While the approach is slick, its somewhat of a hack. Nothing wrong with that, ... [Read more...]