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

July 27, 2013
By
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...

Read more »