1130 search results for "parallel"

Size of each object in R’s workspace

July 22, 2014
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Size of each object in R’s workspace

I’ve googled How do I find out how big my workspace is too many times … here’s the explicit code to run and hopefully the next googler sees this post: for (thing in ls()) { message(thing); print(object.size(get(thing)), units='auto') } Fin. You can stop there.   Or for a bit of context… Here’s an example code to generate objects of variable sizes where you...

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Compile R and OpenBLAS from Source Guide

July 16, 2014
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Compile R and OpenBLAS from Source Guide

This guide is intended to aid any R and Linux user who desires a threaded version of BLAS. In particular I hope this will allow other grad students, who like me do not have many user privileges on their office computer, to follow suit and exploit multiple cores to speed up their linear algebra computations The post

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R 3.1.1 is released (and how to quickly update it on Windows OS)

July 10, 2014
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R 3.1.1 is released (and how to quickly update it on Windows OS)

R 3.1.1 (codename “Sock it to Me“) was released today! You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.1.1 on Windows If you are using Windows you can easily upgrade to the latest version of R using the

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Including GitHub and Bioconductor on Rdocumentation: Technical Details

July 10, 2014
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Including GitHub and Bioconductor on Rdocumentation: Technical Details

In our last blog post we announced the addition of GitHub and  Bioconductor R packages to Rdocumentation. For the more technical amongst you, I’ll give a short, high-level description of what’s under the hood at Rdocumentation. Along with that I’ll zoom in on some of the challenges encountered while adding GitHub and Bioconductor repositories. Rdocumentation

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Reflections on useR! 2014

July 7, 2014
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Reflections on useR! 2014

UseR! 2014, the R user conference held last week in LA, was the most successful yet. Around 700 R users from around the world converged on the UCLA campus to share their experiences with the R language and to socialize with other data scientists, statisticians and others using R. The week began with a series of 3-hour tutorials on...

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How To: 20 Minute Guide to Get Started with PivotalR

July 1, 2014
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How To: 20 Minute Guide to Get Started with PivotalR

In this article, Pivotal engineer and predictive analytics expert Hai Qian explains how someone new to R can get started performing statistical analysis on data stores in Greenplum Database, Pivotal HD and PostgreSQL in just 20 minutes using PivotalR. First, there is some background on R’s popularity, then the articles dives into important topics such as installation, data loading,...

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How To Approximate Pi With A Short Pencil And A Big Paper

July 1, 2014
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How To Approximate Pi With A Short Pencil And A Big Paper

Experiment, be curious: though interfering friends may frown, get furious at each attempt to hold you down (Tony Bennett, Experiment) Instructions: Take a pencil and measure it Take a piece of paper and draw parallel lines on it (you can use the pencil, of course); separation between lines should double the length of the pencil Toss the pencil

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Squeezing more speed from R for nothing, Rcpp style

Squeezing more speed from R for nothing, Rcpp style

In a previous post we explored how you can greatly speed up certain types of long-running computations in R by parallelizing your code using multicore package*. I also mentioned that there were a few other ways to speed up R code; the one I will be exploring in this post is using Rcpp to replace »more

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(Py, R, Cmd) Stan 2.3 Released

June 26, 2014
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We’re happy to announce RStan, PyStan and CmdStan 2.3. Instructions on how to install at: http://mc-stan.org/ As always, let us know if you’re having problems or have comments or suggestions. We’re hoping to roll out the next release a bit quicker this time, because we have lots of good new features that are almost ready The post

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R Scrabble: Part 2

June 25, 2014
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R Scrabble: Part 2

Ivan Nazarov and Bartek Chroł gave very interesting comments to my last post on counting number of subwords in NGSL words. In particular they proposed large speedups of my code. So I thought to try checking a larger data set. So today I will work with TWL2006 - the official word authority for tournament Scrabble...

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