We are happy to report that one of the Google Summer of Code students from last year, Ian Fellows, has been awarded the John M. Chambers Statistical Software Award for his work with the R Project. This award will be presented at the annual Joint Statistical Meeting in August. Ian’... [Read more...]

August last year I asked on BioStar about how to import RDF into the R statistical package and at the time nothing seemed existing. Over the past few weeks I ported code I wrote for Bioclipse to create the rrdf package for R, which is now available fro... [Read more...]

We're on our way to Chicago for the annual conference for R users in Finance, R/Finance 2011. Revolution Analytics is proud to once again sponsor this conference, and during the sponsor lunch session at noon on Saturday, we're honoured to have Guy Yollin show how the big-data capabilities of Revolution ... [Read more...]

I’ve also previously put up a couple of posts about aggregating data in R. In this post, I’m going to be trying some other alternative methods for aggregating the dataset. Before I begin, I’d like to thank Matthew Dowle for highlighting these to me. It’s a ... [Read more...]

Today I have been playing with the errorbars from knime. To recreate the plot from http://flyordie.sin.khk.be/2011/04/20/day-27-a-lot-of-graphics-in-one-place/ I had to be able to create 2 y-axis, and multiple plots on 1 graph. At the end of the day I ... [Read more...]

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Again for HTML reasons this has been taken to http://strugglingthroughproblems.blogspot.com/2011/04/inside-functors-multiple-arguments.html [Read more...]

Statistical factor models and Ledoit-Wolf shrinkage are competing methods for estimating variance matrices of returns.  So which is better?  This adds a data point for answering that question. Previously There are past blog posts on: the idea of variance matrices factor models of variance The data in this post are ... [Read more...]

The blog SAS Analysis shows how to create 3-D images from SAS data ... using R: Some SAS programmers like to use SAS/IML to call R’s functions [Ref. 2]. However, it seems that SAS/IML fails to work with the latest versions of R since 2.12 [Ref. 3]. Others tend to play ... [Read more...]

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If you haven’t read yesterday’s post, I advise you to do so, because this is the fix of yesterday. Day #27: A lot of graphics in one place I found out how to use ggplot2 in knime. Say, for example, your code is this: library(ggplot2) myplot... [Read more...]

How do you know what machine learning algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure to try different parameters within each algorithm as well), and select the best one by ... [Read more...]

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I stumbled upon this tutorial while not studying and I thought it would be fun to try and plot maps of the San Francisco Bay Area household income, education, population density, poverty, etc...To do this I needed a Shapefile for the Bay Area zip codes similar to the London ... [Read more...]

So, WordPress doesn’t like RweaveHTML, so this is posted at http://strugglingthroughproblems.blogspot.com/2011/04/inside-functors.html [Read more...]

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We've just released the latest update to Revolution R Enterprise, version 4.3. This release includes version 2.12.2 of the open-source R engine linked with high-performance libraries, and packages it with additional functionality from Revolution Analytics for big data statistics, web services deployment, a Windows UI for R programming and debugging, and much ... [Read more...]

The latest release of Revolution R Enterprise shows how Revolution Analytics’ package for big data, RevoScaleR, is continuing add new capabilities for Big Data statistics. RevoScaleR removes the limits on the size of the data that can be processed in R through the use of the highly efficient .Xdf binary ... [Read more...]

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