Dynamic Data Visualizations in the Browser Using Shiny

June 18, 2013
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Dynamic Data Visualizations in the Browser Using Shiny

After being busy the last two weeks teaching and attending academic conferences, I finally found some time to do what I love, program data visualizations using R. After being interested in Shiny for a while, I finally decided to pull the trigger and build my first Shiny app! I wanted to make a proof of

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Printing R help files in the console or in knitr documents

June 18, 2013
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Yesterday, I was creating a knitr document based on a script, and was looking for a way to include content from an R help file. The script,...

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Resources for getting started with R

June 18, 2013
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Resources for getting started with R

As we believe you may know, we are having a webinar tomorrow (June 19th, 2013) on Predictive Analytics. During this webinar, you are going to be introduced to R,...

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BCEA 1.3.0

June 18, 2013
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BCEA 1.3.0

After months of work (although to be fair, we haven't worked 100% full time on this), Andrea and I are nearly ready to publish the next release of BCEA. Andrea...

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R GIS: Terrain Analysis for Polygons as Simple as it Gets!

June 18, 2013
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R GIS: Terrain Analysis for Polygons as Simple as it Gets!


library(raster)
library(rgdal)

alt gadm gadm_sub
plot(alt)
plot(gadm_sub, add=T)

asp slo
> extract(slo, gadm_sub, fun = mean, na.rm = T, small = T, df = T)
ID ...

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Quickly read Excel worksheets into R (Windows only…sorry)

June 18, 2013
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I suppose most companies use the Microsoft Office suite of programs, and my office is no exception. It easy to import data from an API or a database into...

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Use R to Bulk-Download Digital Elevation Data with 1" Resolution

June 18, 2013
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Here's a little r-script to convenientely download high quality digital elevation data, i.e. for the Alps, from HERE:

require(XML)

dir.create("D:/GIS_DataBase/DEM/")
setwd("D:/GIS_DataBase/DEM/")

doc urls names
for (i in 1:length(urls)) download.file(urls, names)

# unzip...

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Evaluating Optimization Algorithms in MATLAB, Python, and R

June 18, 2013
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Evaluating Optimization Algorithms in MATLAB, Python, and R

As those of you who read my last post know, I’m at the NIMBioS-CAMBAM workshop on linking mathematical models to biological data here at UT Knoxville. Day 1 (today)...

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googleVis 0.4.3 released with improved Geocharts

June 18, 2013
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The Google Charts Tools provide two kinds of heat map charts for geographical data, the Flash based Geomap and the HTML5/SVG based Geochart.

I prefer the Geochart...

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Computerworld’s Beginners Guide to R

June 17, 2013
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Sharon Machlis is not only the online managing editor at Computerworld, she's also a budding data scientist who recently started learning the R language. To the benefit of all...

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Zombie Apocalypse Survival Test – R-Powered (using Concerto)

June 17, 2013
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Zombie Apocalypse Survival Test – R-Powered (using Concerto)

This test is the first attempt to seriously assess the ability of individuals to survive a zombie apocalypse.  This test is administered using the R powered open-source testing platform...

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Bayesian computational tools

June 17, 2013
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Bayesian computational tools

I just updated my short review on Bayesian computational tools I first wrote in April for the Annual Review of Statistics and Its Applications. The coverage is quite restricted,...

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Dave Harris on Maximum Likelihood Estimation

June 17, 2013
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Dave Harris on Maximum Likelihood Estimation

(This article was first published on Noam Ross - R, and kindly contributed to R-bloggers) At our last Davis R Users’ Group meeting of the quarter, Dave Harris gave...

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Oracle R Connector for Hadoop 2.1.0 released

June 17, 2013
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(This article was first published on Oracle R Enterprise, and kindly contributed to R-bloggers) Oracle R Connector for Hadoop (ORCH), a collection of R packages that enables Big Data...

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Stashing and playing with raw data locally from the web

June 17, 2013
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It is getting easier to get data directly into R from the web. Often R packages that retrieve data from the web return useful R data structures to users...

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analyze the pesquisa de orcamentos familiares (pof) with r

June 17, 2013
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for the unlucky among us born without a portuguese mother tongue, the pesquisa de orcamentos familiares (pof) translates to survey of household budgets.  this data set captures brazilian family...

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The equivalence of the ellipsis argument and an infinite set of closures

June 16, 2013
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The equivalence of the ellipsis argument and an infinite set of closures

This post is about a practical application of a topic I discuss in my book. In my book, I prove …

Continue reading »

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Scenario analysis and trading options using R

June 16, 2013
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Scenario analysis and trading options using R

I present you with my restructured project on options trading and scenario analysis. You are more than welcome to try it out. Firstly, I will give a small presentation...

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The scaling of Expected Shortfall

June 16, 2013
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The scaling of Expected Shortfall

Getting Expected Shortfall given the standard deviation or Value at Risk. Previously There have been a few posts about Value at Risk and Expected Shortfall. Properties of the stable...

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Distribution of car weights

June 16, 2013
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Distribution of car weights

Two weeks ago I described car data, among which weight distribution of cars in Netherlands. At that time it was purely plots. In the mean time I decided I wanted...

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On the RStudio download logs

On the RStudio download logs

Some days ago H. Wickham (Chief Scientist of the RStudio company) posted an article about the RStudio CRAN mirror with …

Continuar leyendo »

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General Regression Neural Network with R

June 15, 2013
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General Regression Neural Network with R

Similar to the back propagation neural network, the general regression neural network (GRNN) is also a good tool for the function approximation in the modeling toolbox. Proposed by Specht...

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Practicing static typing in R: Prime directive on trusting our functions with object oriented programming

June 14, 2013
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(This article was first published on Memo's Island, and kindly contributed to R-bloggers) The creator of S language which R is derived from John Chambers said in one of...

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Simulating Map-Reduce in R for Big Data Analysis Using Flights Data

June 14, 2013
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Simulating Map-Reduce in R for Big Data Analysis Using Flights Data

At datadolph.in, we are constantly crunching through large amounts of data.  We are designing unique and innovative ways to process large datasets on a single node and use distributed computing only...

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Sudoku Automation Solver Challenge – R

June 14, 2013
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Sudoku Automation Solver Challenge – R

On a recent flight I was bored waiting for the plane to land and I tried out the electronic sudoku game that they had offered.  I found the game...

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A list of R packages, by popularity

June 14, 2013
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A list of R packages, by popularity

R package developer (and R-bloggers editor) Tal Galili just published the answers to a question many R users have asked: which are the most popular R packages? He wrote...

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Interval Estimation of the Population Mean

June 14, 2013
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Interval estimation of the population mean can be computed from the functions of the following R packages:stats - contains the t.testTeachingDemos - contains the z.testBSDA - contains the zsum.test...

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How big data and statistical modeling are changing video games

June 13, 2013
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Bill Grosso presented a fascinating webinar about the video gaming industry today, Knowing How People are Playing Your Game Gives You the Winning Hand. He described how over the...

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Big in Japan

June 13, 2013
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Big in Japan

(This article was first published on Gianluca Baio's blog, and kindly contributed to R-bloggers) Inspired by this post on R-bloggers, I decided to check how BCEA was doing. Unfortunately,...

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