2130 search results for "Regression"

Exposure as a possible explanatory variable

August 13, 2013
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Exposure as a possible explanatory variable

Iin insurance pricing, the exposure is usually used as an offset variable to model claims frequency. As explained many times on this blog (e.g. here), and in my notes, if we have to identical drivers, but one with an exposure of 6 months, and the other one of one year, it should be natural to assume that, on average,...

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A Stata HTML syntax highlighter in R

August 12, 2013
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So I have been having difficulty getting my Stata code to look the way I want it to look when I post it to my blog.  To alleviate this condition I have written a html encoder in R.  I don't know much about html so it is likely to be a little ...

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Variable importance in neural networks

August 12, 2013
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Variable importance in neural networks

If you’re a regular reader of my blog you’ll know that I’ve spent some time dabbling with neural networks. As I explained here, I’ve used neural networks in my own research to develop inference into causation. Neural networks fall under two general categories that describe their intended use. Supervised neural networks (e.g., multilayer feed-forward networks)

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Identifying Potential Customers with Classification Techniques in R Language

August 12, 2013
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Identifying Potential Customers with Classification Techniques in R Language

Data mining techniques and algorithms such as Decision Tree, Naïve Bayes, Support Vector Machine, Random Forest, and Logistic Regression are “most commonly used for predicting a specific outcome such as response / no-response, high / medium / low-value customer, likely to buy / not buy.”1 In this article, we will demonstrate how to use R

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Software carpentry

August 11, 2013
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Software carpentry

I would never call myself a programmer, but as an ecologists I manage moderately big and complicated datasets, and that require to interact with my computer to get the most of them. I self-taught most of the things I need … Continue reading →

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R-Squared for a VBGM

August 9, 2013
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R-Squared for a VBGM

Recently, a fishR user asked me the following question: After fitting the age-length data into VBGM, I overviewed the results. But I can’t find the coefficient of determination () for the VBGM fitting. Because some reviewer want the the coefficient … Continue reading →

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Classifieur Naïf Bayésien

August 5, 2013
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IntroductionLe classifieur naïf bayésien est l'une des méthodes les plus simples en apprentissage supervisé basée sur le théorème de Bayes. il est peu utilisé par les praticiens du data mining au détriment des méthodes traditionnelles que sont les arbres de décision ou les régressions logistiques.Un avantage de cette méthode est la simplicité de programmation, la facilité d'estimation des paramètres...

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Measuring Bias in Published Work

July 31, 2013
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Measuring Bias in Published Work

In a series of previous posts, I’ve spent some time looking at the idea that the review and publication process in political science—and specifically, the requirement that a result must be statistically significant in order to be scientifically notable or publishable—produces a very misleading scientific literature. In short, published studies of some relationship will tend

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Measuring Bias in Published Work

July 31, 2013
By
Measuring Bias in Published Work

In a series of previous posts, I’ve spent some time looking at the idea that the review and publication process in political science—and specifically, the requirement that a result must be statistically significant in order to be scientifically notable or publishable—produces a very misleading scientific literature. In short, published studies of some relationship will tend

Read more »

Crowdfunding the Ubuntu Edge will fail

July 30, 2013
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Crowdfunding the Ubuntu Edge will fail

Tuesday 30 July 2013 - 14:14 Although the Ubuntu Edge has been record-breaking in its crowdfunding efforts, the fundraising campaign will fall well short of its 32 million dollar target. Just to be clear, I hope to be proven wrong! I backed the Ubuntu Edge Indiegogo fundraiser at the $625 level...

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