Monthly Archives: July 2013

Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

July 28, 2013
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Classification of the Hyper-Spectral and LiDAR Imagery using R (mostly). Part 1: Result Evaluation

Introduction There was the EEEI Data Fusion Contest this spring. This year they wanted people to elaborate about hyper-spectral (142-bands imagery) and LiDAR data. The resolution of the data-set was about 5 m.  There were 2 nominations: best classification and  the best scientific paper.  I work with high-resolution imagery quite often, but classification is a very rear task for me...

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Hopfield Networks in Julia

July 28, 2013
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Hopfield Networks in Julia

As a fun side project last night, I decided to implement a basic package for working with Hopfield networks in Julia. Since I suspect many of the readers of this blog have never seen a Hopfield net before, let me explain what they are and what they can be used for. The short-and-skinny is that

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Modeling Match Results in La Liga Using a Hierarchical Bayesian Poisson Model: Part two.

July 28, 2013
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Modeling Match Results in La Liga Using a Hierarchical Bayesian Poisson Model: Part two.

In the last blog post I showed my initial attempt at modeling football results in La Liga using a Bayesian Poission model, but there was one glaring problem with the model; it did not consider the advantage of being the home team. In this post I will show how to fix this! I will also show a way...

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A JAGS calculation on pattern of rain January 1906-1915 against 2003-2012

July 28, 2013
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Two weeks ago I showed rain data from six stations in Netherlands years 1906 till now. Last week I showed that frequency of days with and without rain differed between December 1906-1915 and December 2003-2012. This week I am considering the ...

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SAP HANA OData and R

SAP HANA OData and R

As you might have discovered by now...I love R...it's just an amazing programming language...By now...I have integrate R and SAP HANA via ODBC and via the SAP HANA-R integration...but I have completely left out the SAP HANA OData capabilities.For this ...

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H*Wind Analyses Using R

July 27, 2013
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I did a (relatively) simple work-up over on Github showing how to load in AOML/NOAA H*Wind analysis data and display it. I used the R program, which is an open-source, community-maintained statistical platform capable of handling – well – just about anything. So what is H*Wind? From AOML/NOAA: Since 1996 the Hurricane Research Division has participated in... Continue reading » The...

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The Secrets of Inverse Brogramming, reprise

July 27, 2013
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The Secrets of Inverse Brogramming, reprise

Brogramming is the art of looking good while you write code. Inverse brogramming is a silly term that I’m trying to coin for the opposite, but more important, concept: the art of writing good looking code. At useR2013 I gave a talk on inverse brogramming in R – for those of you who weren’t there

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Science link fest for the week of the 27th

July 27, 2013
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Science link fest for the week of the 27th

Hello Paleoposse! This week I bring you Egyptians and iron meteorites, Neil deGrasse Tyson as the Carl Sagan of our generation and a mild rant about poor quality science reporting. I’m off to enjoy my 30th birthday. Hope you all have an awesome weekend! Solid science: Here’s a story that’s near and dear to my

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Whilst reading John Hempton’s post on shorting $HLF I…

July 27, 2013
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Whilst reading John Hempton’s post on shorting $HLF I…

only the most active trading days $HLF (HerbaLife weight-loss supplements / MLM) $HLF regular history big loss days and big volume days for $HLF. "Ackman" should instead read "Einhorn".Whilst reading John Hempton’s post on shorting $HLF I decided to follow along in quantmod. Bronte Capital: It was the night before Christmas… falsifying Bill Ackman’s...

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Using Geany for programming in R

July 27, 2013
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Using Geany for programming in R

I like Geany as a no-nonsense Integrated Development Environment (IDE). It is fast, elegant, intuitive, and lets you get your programming job done. (I certainly find it superior to the more popular Gedit.) You can also use it to program in R, and this page will show off some tips for doing that. Execute commands

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