997 search results for "maps"

Next Kölner R User Meeting: 26 February 2014

February 25, 2014
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Next Kölner R User Meeting: 26 February 2014

The next Cologne R user group meeting is scheduled for tomorrow, 26 February 2014. We are delighted to welcome: Diego de Castillo: R and databases Kim Kuen Tang: Hands on using R and kdb+ together Frank Celler: ArangoDB (Lightning Talk) Further details and the agenda are available on our KölnRUG Meetup site. Please sign up if you would like to come...

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A survival guide to Data Science with R, from Graham Williams

February 21, 2014
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Graham Williams is the Lead Data Scientist at the Australian Taxation Office, and the creator of Rattle, an open-source GUI for data mining with R. (Check out some recent reviews/demos of Rattle on this blog here and here.) Dr Williams continues his many contributions to the R community with One Page R, a "Survival Guide to Data Science with...

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Forecasting within limits

February 21, 2014
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Forecasting within limits

It is common to want forecasts to be positive, or to require them to be within some specified range . Both of these situations are relatively easy to handle using transformations. Positive forecasts To impose a positivity constraint, simply work on the log scale. With the forecast package in R, this can be handled by specifying the Box-Cox parameter...

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Voting Twice in France

February 19, 2014
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Voting Twice in France

On the Monkey Cage blog, Baptiste Coulmont (a.k.a. @coulmont) recently uploaded a post entitled “You can vote twice ! The many political appeals of proxy votes in France“, coauthored with Joël Gombin (a.k.a. @joelgombin), and myself. The study was initially written in French as mentioned in a previous post. Baptiste posted additional information on his blog (http://coulmont.com/blog/…) and I also wanted to post some lines of code,...

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AntWeb – programmatic interface to ant biodiversity data

February 18, 2014
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AntWeb – programmatic interface to ant biodiversity data

Data on more than 10,000 species of ants recorded worldwide are available through from California Academy of Sciences' AntWeb, a repository that boasts a wealth of natural history data, digital images, and specimen records on ant species from a large community of museum curators. Digging through some of the earliest announcements of AntWeb, I came across...

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Changed and new things in the new version of rgbif, v0.5

February 17, 2014
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rgbif is an R package to search and retrieve data from the Global Biodiverity Information Facilty (GBIF). rgbif wraps R code around the to allow you to talk to GBIF from R. We just pushed a new verion of rgbif to cran - v0.5.0. Source and binary files are now available on CRAN. There are...

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“Digit Recognizer” Challenge on Kaggle using SVM Classification

February 14, 2014
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“Digit Recognizer” Challenge on Kaggle using SVM Classification

This article is about the “Digit Recognizer” challenge on Kaggle. You are provided with two data sets. One for training: consisting of 42’000 labeled pixel vectors and one for the final benchmark: consisting of 28’000 vectors while labels are not … Continue reading → The post “Digit Recognizer” Challenge on Kaggle using SVM Classification appeared first on...

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3D Plots in R

February 13, 2014
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3D Plots in R

by Joseph Rickert Recently, I was trying to remember how to make a 3D scatter plot in R when it occurred to me that the documentation on how to do this is scattered all over the place. Hence, this short organizational note that you may find useful. First of all, for the benefit of newcomers, I should mention that...

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Valentines-day full moon

February 13, 2014
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Valentines-day full moon

Introduction A wise person told me that it will be a full moon on the upcoming Valentine’s Day, but that it will be a long time until another one. I decided to check this with astronomical calculation. Procedure The Oce package has a function called moonAngle() that returns, among other things, the illuminated fraction of the moon visible at any given...

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oce runlm function

February 11, 2014
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oce runlm function

Introduction As was expected, the runderiv() function has been both useful and deficient. Useful because it offers a good replacement for smooth.spline() calculations of derivatives for things like N^2. And deficient because it only calculated derivatives, not values! Both an extension and a renaming were called for. The result is runlm(). Tests Below are the examples from its manpage, with...

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