Monthly Archives: November 2011

Create your own Beamer template

November 14, 2011
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For the past couple of days, I had been searching for a tutorial that would show how to create a custom Beamer template. I found some great resources and some really great customized templates (I have listed the ones that I referred to below) but none ...

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Parallelization using plyr: loading objects and packages into worker nodes

November 14, 2011
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I really love the plyr package. Apart from having a progress bar and plyr handeling a lot of the overhead, a very interesting feature is being able to run plyr in parallel mode. Essentially, setting .parallel = TRUE runs any… See more ›

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Debugging with

November 14, 2011
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Debugging with

I just found these two gems about debugging in R on r-help today (here is the thread): 1) posted by Thomas Lumley: traceback() gets you a stack trace at the last error options(warn=2) makes warnings into errors options(error=recover) starts the post-mortem debugger at any error, allowing you to inspect the stack interactively. 2) added by

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In Reply to Ben Bolker’s Post "Google Scholar (still) sucks"

November 14, 2011
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In Reply to Ben Bolker’s Post "Google Scholar (still) sucks"

Replying to Ben Bolker's post Google Scholar (still) sucks:Ben,thanks for illustrating the issue in your post!The main purpose of my function GScholarScraper is to retrieve titles - just because this is the best we can get from Google Scholar. Abstract...

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GScholarXScraper: Hacking the GScholarScraper function with XPath

November 13, 2011
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GScholarXScraper: Hacking the GScholarScraper function with XPath

Kay Cichini recently wrote a word-cloud R function called GScholarScraper on his blog which when given a search string will scrape the associated search results returned by Google Scholar, across pages, and then produce a word-cloud visualisation. This was of interest to me because around the same time I posted an independent Google Scholar scraper function  get_google_scholar_df()

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Do they really know what they are doing?

November 13, 2011
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Do they really know what they are doing?

I am talking here about money managers. for those of us who have one. We assume they understand about markets in such a way that they can, and will generate at least the benchmark returns, what ever this benchmark may … Continue reading →

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Google Scholar (still) sucks

November 13, 2011
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(This is a follow-up to my previous post on the topic.)I was encouraged by the appearance of two R-based Scholar-scrapers, within a week of each other. One, by Kay Cichini, converts the page URLs into text mode and scrapes from there (There's a slightl...

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5 Interesting Free Books for R from beginner to experts

November 12, 2011
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Always new software language in one technical activity is difficult, normally a good documentation can help, these are three book to use R software for beginner and for experts: ·         “Introduction to the R Project for Statistical Computing for Use at the ITC” by David Rossiter (PDF, 2010-11-21).

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animation with gridSVG

November 12, 2011
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animation with gridSVG

Some time ago I posted a question in stackoverflow to learn how to produce a multipage SVG file. This is …Continuar leyendo »

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Stochastic reserving with R: ChainLadder 0.1.5-1 released

November 12, 2011
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Stochastic reserving with R: ChainLadder 0.1.5-1 released

Today we published version 0.1.5-1 of the ChainLadder package for R. It provides methods which are typically used in insurance claims reserving to forecast future claims payments.Claims development and chain-ladder forecast of the RAA data set using the Mack methodThe package started out of presentations given...

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