Blog Archives

Odds, odds ratio, language and intuition

January 25, 2015
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I was reading a statistics book the other day. I am at the beginning. In this section I read '(we) report results as odds ratios, which is more intuitive'. I must have read sentences stating this any number of times. But I don't agree.It may be my back...

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SAS PROC MCMC example in R: Logistic Regression Random-Effects Model

January 18, 2015
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In this post I will run SAS example Logistic Regression Random-Effects Model in four R based solutions; Jags, STAN, MCMCpack and LaplacesDemon. To quote the SAS manual: 'The data are taken from Crowder (1978). The Seeds data set is a 2 x 2 fa...

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Multivariate analysis of death rate on the map of Europe

January 11, 2015
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Multivariate analysis of death rate on the map of Europe

Eurostat has information on death rates by cause and NUTS 2 region. I am trying to get this visually displayed on the map. To get there I map all causes to three dimensions via a principal components analysis. These three dimensions are subsequently tr...

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Capital in the Netherlands, 2006-2013

January 4, 2015
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Capital in the Netherlands, 2006-2013

I guess most people have heard of Piketty and his book capital in the twenty-First century. I don't have that book, but the media attention has made me wonder if I could see any trends in Dutch public data. As I progressed with this post, I have conclu...

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A time series contest attempt

December 28, 2014
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A time series contest attempt

I saw the post a time series contest on Rob J Hyndman's blog. Since I am still wanting to play around with some bigger data sets, so I went to the source website https://drive.google.com/folderview?id=0BxmzB6Xm7Ga1MGxsdlMxbGllZnM&usp=shar...

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Merry Christmas

December 21, 2014
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Merry Christmas

Based on The DO loop, since I wanted a fractal Christmas tree and there is no point in inventing what has been made already. Besides, this is not the first time this year that I used R to do what has been done in SAS.Code# http://blogs.sas.com/content/...

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Monthly Weather in Netherlands

December 14, 2014
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Monthly Weather in Netherlands

When I downloaded the KNMI meteorological data, the intention was to do something which takes more than just the computers memory. While it is clearly not big data, at the very least 100 years of daily data is not small either. So I took along a load o...

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SAS PROC MCMC in R: Nonlinear Poisson Regression Models

December 6, 2014
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SAS PROC MCMC in R: Nonlinear Poisson Regression Models

In exercise 61.1 the problem is that the model has bad mixing. In the SAS manual the mixing is demonstrated after which a modified distribution is used to fix the model.In this post the same problem is tackled in R; MCMCpack, RJags, RStan and LaplaceDemon. MCMCpack has quite some mixing problems, RStan seems to do best.DataTo quote the SAS...

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Change in temperature in Netherlands over the last century

November 30, 2014
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Change in temperature in Netherlands over the last century

I read a post 'race for the warmest year' at sargasso.nl. They used a plot, originating from Ed Hawkins to see how 2014 progressed to be warmest year. Obviously I wanted to make the same plot using R. In addition, I wondered which parts of the year had...

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When should I change to snow tires in Netherlands

November 23, 2014
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When should I change to snow tires in Netherlands

The Royal Netherlands Meteorological Institute has weather information by day for a number of Dutch stations. In this post I want to use those data for a practical problem: when should I switch to winter tires? (or is that snow tires? In any case nails...

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