2722 search results for "gis"

R code and data for book “R and Data Mining: Examples and Case Studies”

January 2, 2013
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R code and data for book “R and Data Mining: Examples and Case Studies”

R code and data for book “R and Data Mining: Examples and Case Studies” are now available at http://www.rdatamining.com/books/rdm/code. An online PDF version of the book (the first 11  chapters only) can also be downloaded at http://www.rdatamining.com/docs. Below are its … Continue reading →

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Polarisation and Mobilisation indicators

January 1, 2013
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Polarisation and Mobilisation indicators

This blog post makes available a set of indicators discussed in a forthcoming edition of Digital Icons. In brief, the script takes a text input and calculates polarisation and mobilisation indexes based on the number of pronouns featured.The hypothesised relationship between pronouns and polarisation is one discussed extensively by critical discourse analysts, social...

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Software engineer’s guide to getting started with data science

December 30, 2012
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Software engineer’s guide to getting started with data science

Many of my software engineer friends ask me about learning data science. There are many articles on this subject from renowned data scientists (Dataspora, Gigaom, Quora, Hilary Mason). This post captures my journey (a software engin...

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Misusage of the new shiny package: A nerdy drink tracker for your next party

December 30, 2012
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Misusage of the new shiny package: A nerdy drink tracker for your next party

Currently a lot of people are talking about the new shiny package. So I got curious and built an own, more or less useful app: A drink trackerThis app can be used to track how much someone drank and therefore it is very useful for every party, especial...

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Update to Graphing Non-Proportional Hazards in R

December 30, 2012
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Update to Graphing Non-Proportional Hazards in R

Update 1 February 2013: I've moved all of the functionality described in this post into an R package called simtvc. Have a look. It is much easier to use. This is a quick update for a previous post on Graphing Non-Proportional Hazards in R. In the previous post I showed how to simulate and graph 1,000...

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Row-wise summary curves in faceted ggplot2 figures

December 29, 2012
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Row-wise summary curves in faceted ggplot2 figures

I really enjoy reading the Junk Charts blog.  A recent post made me wonder how easy it would be to add summary curves for small-multiple type plots, assuming the “small multiples” to summarize were the X component of a ggplot2::facet_grid(Y ~ X) … Continue reading →

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Men who stare at needles

December 29, 2012
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Buffon's needle problem is a question first posed in the 18th century by Georges-Louis Leclerc, Comte de Buffon:What is the probability that a needle thrown at a lined sheet of paper will cross a line?This problem can be used to estimate π. If we set the nail size and the line distance = 1, the estimator can be calculated...

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My Intro to Multiple Classification with Random Forests, Conditional Inference Trees, and Linear Discriminant Analysis

December 27, 2012
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My Intro to Multiple Classification with Random Forests, Conditional Inference Trees, and Linear Discriminant Analysis

After the work I did for my last post, I wanted to practice doing multiple classification.  I first thought of using the famous iris dataset, but felt that was a little boring.  Ideally, I wanted to look for a practice … Continue reading →

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Who Survived on the Titanic? Predictive Classification with Parametric and Non-parametric Models

December 24, 2012
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Who Survived on the Titanic? Predictive Classification with Parametric and Non-parametric Models

I recently read a really interesting blog post about trying to predict who survived on the Titanic with standard GLM models and two forms of non-parametric classification tree (CART) methodology. The post was featured on R-bloggers, and I think it's worth a closer look. The basic idea was to figure out which of these three

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Make a Christmas Tree in R with random ornaments/presents

December 24, 2012
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Make a Christmas Tree in R with random ornaments/presents

Happy holidays!     Link to Gist

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