Monthly Archives: February 2012

how to work with data tables in r

February 20, 2012
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(This article was first published on twotorials by anthony damico, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: twotorials by anthony damico. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

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weird [lack of] control…

February 20, 2012
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weird [lack of] control…

When I ran I was expecting the same output as So this means that the dummy index in R “for” loops cannot be tweaked that easily. I seem to remember doing this kind of (dirty) tricks with earlier versions… Now, Alessandra and Robin think this is a good thing that the for loop is robust

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GUI building in R: gWidgets vs Deducer

February 20, 2012
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GUI building in R: gWidgets vs Deducer

I’ve been a user (and fan) of gWidgets for a couple of years now for GUI building in R. (See my introduction to it here.) However, it’s always good to check out the competition so I’ve been playing around with Deducer to see how they compare. R can access a number of GUI building frameworks

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R_inferno

February 20, 2012
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Knowing the weakness of your tool is a shortcut toward getting really good at it.

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Big data seminar in London on 1 March 2012

February 20, 2012
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Big data seminar in London on 1 March 2012

Removable disk packs in 1975Source: Wikipedia, via Deutsche Fotothek  David Chan from City University is organising an interdisciplinary symposium on tackling the ‘Big Data’ challenge on 1 March 2012.It is an open seminar trying to bring ...

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New R User Group at Berkeley

February 20, 2012
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There's a new R user group in Berkely, CA: The Berkeley R Language Beginner Study Group. Join this small group for a step-by-step approach to learn the language R. Each session will be filled with examples and participants are welcome to suggest and present topics. If you have just started with R this is the perfect chance to find...

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Simplifying spatial polygons in R

February 20, 2012
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Simplifying spatial polygons in R

Polygon simplification is something others have written about, using R packages such as shapefiles. This explores how package ‘rgeos’ uses the Ramer–Douglas–Peucker algorithm, a method commonly used in GIS systems for simplifying shapefiles. It works by imposing a deviation tolerance … Continue reading →

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Upcoming Statistics.com courses on the use of R (all online)

February 20, 2012
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Guest post:  Statistics.com is offering a list of courses about R from some of the leading experts in their fields.  They offer a $200 discount for anyone who orders any 3 courses from them at one time.  Here is the list of R specific courses (with links): Feb 10:  Introduction to R – Data Handling (http://bit.ly/z9k0vk) taught by Paul Murrell...

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Maps with R (II)

February 20, 2012
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Maps with R (II)

In my my last post I described how to produce a multivariate choropleth map with R. Now I will show …Continuar leyendo »

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What does ‘passive investing’ really mean?

February 20, 2012
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What does ‘passive investing’ really mean?

We know the words but what do they mean? Some definitions Here are some definitions of “passive investment management”. Investopedia says: A style of management associated with mutual and exchange-traded funds (ETF) where a fund’s portfolio mirrors a market index. Wikipedia says: Passive management (also called passive investing) is a financial strategy in which an investor (or … Continue reading...

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