2686 search results for "Map"

Using R — Working with Geospatial Data

April 14, 2013
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Using R — Working with Geospatial Data

This entry is part 6 of 12 in the series Using RGIS, an acronym that brings joy to some and strikes fear in the heart of those not interested in buying expensive software. Luckily fight or flight can be saved for another day because you …   read more ...

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Mathematical abstraction and the robustness to assumptions

April 12, 2013
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Mathematical abstraction and the robustness to assumptions

I’ve been showing my new favourite toys to just about anyone foolish enough to actually engage me in conversation. I described how my shiny new set of non-transitive dice work here, complete with a map showing all the relevant probabilities. All was neat and tidy and wonderful until fellow ecologist, Aaron Ball, tried to burst

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Processing ABI .fsa files in R, part 1.

April 11, 2013
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Processing ABI .fsa files in R, part 1.

I’ve been working on a lot of AFLP data this winter. I’d really like to be able to do all the analysis in R, for a few reasons. First, it would mean no more fighting with GeneMapper, which is incredibly frustrating: it’s Windows-only, expensive, closed-source and painfully underpowered for the job. Second, presumably if I

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High Obesity levels found among fat-tailed distributions

April 11, 2013
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High Obesity levels found among fat-tailed distributions

In my never ending quest to find the perfect measure of tail fatness, I ran across this recent paper by Cooke, Nieboer, and Misiewicz. They created a measure called the “Obesity index.” Here’s how it works: Step 1: Sample four times from a distribution. The sample points should be independent and identically distributed (did your

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In case you missed it: March 2013 Roundup

April 10, 2013
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In case you missed them, here are some articles from March of particular interest to R users. Facebook used R to analyze profile photo changes to create a map of same-sex marriage support in the USA. Joe Rickert contrasts random sampling with fitting models directly to large data sets. A presentation by Carlos Somohano summarizes the history, skills and...

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Global Distribution of Breast Cancer: some initial considerations

April 10, 2013
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Global Distribution of Breast Cancer: some initial considerations

As mentioned on a previous post, I am interested in analysing if people’s ‘unhealthy’ lifestyle is associated to new cases of cancer diagnosed globally. The outcome variable I want to explore (at least for now), is the number of new cases of breast cancer in 100,000 female residents. I have this data for 173...

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Package-Wide Variables/Cache in R Packages

April 8, 2013
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It’s often beneficial to have a variable shared between all the functions in an R package. One obvious example would be the maintenance of a package-wide cache for all of your functions. I’ve encountered this situation multiple times and always forget at least one important step in the process, so I thought I’d document it

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Use foursquare to locate a twitter user using R

April 8, 2013
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Use foursquare to locate a twitter user using R

I've been doing some work with Twitter data. In much of this work, my life would be so much easier if we could geographically locate the origin of the tweets. There are some ways to do this using the twitter APIs. For example, if a user has geo-locatio...

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Starting Analysis and Visualisation of Spatial Data with R

April 8, 2013
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Starting Analysis and Visualisation of Spatial Data with R

Last week I ran an introductory workshop on the analysi

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Next Kölner R User Meeting: 12 April 2013

April 8, 2013
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Next Kölner R User Meeting: 12 April 2013

Quick reminder: The next Cologne R user group meeting is scheduled for this Friday, 12 April 2013. We will discuss cluster analysis and shiny. Further details and the agenda are available on our KölnRUG Meetup site. Please sign up if you would like to come along. Notes from the last Cologne R user group meeting are...

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