3790 search results for "gis"

Mini-Hackathon in Philadelphia, tonight!

May 14, 2014
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If you're in the Philadelphia area and want to hack on some data with other R users this evening, come to the IntegriChain/Revolution Analytics Meetup at Drexel University. There will be an short lecture to introduce the problem, followed by a hacking session (virtual machines with Revolution R software and data will be provided). And of course, plenty of...

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Running R on 32 cores for 2USD/h

May 14, 2014
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Even though most modern computers already have four cores that can be used to speed up analysis – see here for a description. However, after starting to do more simulation studies it became apparent that this is highly impractical. The solution: Running R via R-studio on Amazons cloud servers. Thanks to Lois Aslett (http://www.louisaslett.com/RStudio_AMI/) this

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rOpenHack report

May 13, 2014
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rOpenHack report

The rOpenSci project is a poster child for the fluid collaboration that has become increasingly common these days thanks to platforms like Twitter and GitHub. It has been really inspring to see open discussions take shape as rough ideas, which rapidly turn into prototype research software, all of which are now happening in the order of few days to...

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Building JSON in R: Three Methods

May 13, 2014
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When I set out to build RSiteCatalyst, I had a few major goals: learn R, build a CRAN-worthy package and learn the Adobe Analytics API. As I reflect back on how the package has evolved over the past two years and what I’ve learned, I think my greatest learning was around how to deal with JSON Building JSON...

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CFP: AusDM 2014 – the 12th Australasian Data Mining Conference

May 13, 2014
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CFP: AusDM 2014 – the 12th Australasian Data Mining Conference

********************************************************* 12th Australasian Data Mining Conference (AusDM 2014) Brisbane, Australia 27-28 November 2014 http://ausdm14.ausdm.org/ ********************************************************* Data Mining is the art and science of intelligent analysis of (usually big) data sets for meaningful insights. Data mining is actively applied across all … Continue reading →

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RStudio: Pushing to Github with ssh-authentication

May 12, 2014
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RStudio: Pushing to Github with ssh-authentication

If RStudio prompts you for a username and password every time you try to push your project to Github, open the shell (Git menu: More/Shel...) and do the following:1) Set username and email (if you did not do that before)git config --global user.name "y...

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Updated list of upcoming Rcpp talks and workshops

This is an updated version of an earlier post in March. A number of talks about Rcpp are scheduled over the next couple of months: On Wednesday May 14 I will be speaking at the Chicago R Users Group meeting charmingly titled Warm Up for R...

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A Tutorial and Talk at useR! 2014 [Important Update]

May 12, 2014
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See the update below I'll be doing a morning tutorial at useR! at the end of June in Los Angeles. I've done this same presentation at the last few conferences and this will probably be the last time for this specific workshop. The tutorial outline is: Conventions in R Data splitting and estimating performance Data pre-processing Over-fitting and resampling Training and tuning tree...

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Twitter sentiment analysis based on affective lexicons with R

Twitter sentiment analysis based on affective lexicons with R

Continue to dig tweets. After we reviewed how to count positive, negative and neutral tweets in previous post, I discovered another great idea. Suppose positive or negative is not enough and we want to understand the rate of positivity or negativity. For example, “good” in tweet has 4 points rating, but “perfect” has 6. Thus, we... Read More »

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Automatically Exporting Multiple Cross Tables from Tableau Server into Excel

May 10, 2014
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Automatically Exporting Multiple Cross Tables from Tableau Server into Excel

Introduction The following blog post is based on a classical reporting task most of the people working in BI got frequently: Besides all the nice dashboards you create in Tableau, from time to time people will approach you with a request for a “data extract” – reports that...

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