2814 search results for "GIS"

Uncertainty in markov chains: fun with snakes and ladders

December 31, 2011
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Uncertainty in markov chains: fun with snakes and ladders

I love board games. Over the holidays, I came across this interesting post over at Arthur Charpentier’s Freakonometrics blog about the classic game of snakes and ladders. The post is a nice little demonstration of how the game can be formulated completely as a Markov chain, and can be analysed simply using the mathematics of

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Using factor analysis or principal components analysis or measurement-error models for biological measurements in archaeology?

December 31, 2011
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Greg Campbell writes: I am a Canadian archaeologist (BSc in Chemistry) researching the past human use of European Atlantic shellfish. After two decades of practice I am finally getting a MA in archaeology at Reading. I am seeing if the habitat or size of harvested mussels (Mytilus edulis) can be reconstructed from measurements of the The post Using...

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Is R turning into an operating system?

December 31, 2011
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Is R turning into an operating system?

Over the years I convinced my colleagues and IT guys that R and LaTeX/XeLaTeX is the way forward to produce lots of customer reports with individual data, charts, analysis and text. Success!But of course the operating system in the office is still MS W...

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Benchmarking time series models

December 29, 2011
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Benchmarking time series models

This is a quick post on the importance of benchmarking time-series forecasts.  First we need to reload the functions from my last few posts on times-series cross-validation.  (I copied the relevant code at the bottom of this post so you don't...

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Weecology can has new mammal dataset

December 29, 2011
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Weecology can has new mammal dataset

So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology.  I know nothing about mammal communities, but that doesn't mean one can't play with the data...Their dataset consists of five csv files: &...

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Weecology can has new mammal dataset

December 29, 2011
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Weecology can has new mammal dataset

So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology.  I know nothing about mammal communities, but that doesn't mean one can't play with the data... Their dataset consists of five csv fil...

Read more »

Weecology can has new mammal dataset

December 29, 2011
By
Weecology can has new mammal dataset

So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology.  I know nothing about mammal communities, but that doesn't mean one can't play with the data... Their dataset consists of five csv fil...

Read more »

Japan Stagnation Myth?

December 28, 2011
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Japan Stagnation Myth?

I came across this piece on The Atlantic website by Eamonn Fingleton arguing that Japan's two decade long stagnation is largely a myth. I'm not willing, just yet, to completely go along with his thesis that this myth has been stoked by the Japanes...

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Homicides in Mexico 2010

December 28, 2011
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Homicides in Mexico 2010

Recently the Mexican government released to the public the final homicide data for 2010, and as you can see from the chart Mexico has suffered from a steep rise in homicides since 2008, and in 2010 reached the highest homicide rate in recent history. The Mexican government had actually released preliminary homicide data...

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Modelling returns using PCA : Evidence from Indian equity market

December 26, 2011
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As my finance term paper, I investigated an interesting question where I tried to identify macroeconomic variables that explain the returns on equities. Much of the debate has already taken place on this topic which has given rise to two competing theo...

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