May 2013

HOWTO: X11 Forwarding for Oracle R Enterprise

May 25, 2013 | Sherry Lamonica

v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Oracle R Enterprise enables users to generate R graphs at the database server and return them in a variety of ways: an ...
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Sentiment analysis finds trouble in the Enron emails

May 24, 2013 | David Smith

The Enron email dataset, collected during the FERC investigation of the Enron financial scandal, represents the largest publicly available set of emails. This makes theman ideal testbed for sentiment analysis algorithms. Ikanow's Andrew Strite used the open-source Infinit.e framework and a Hadoop cluster to generate sentiment scores for all ... [Read more...]

Down and Dirty Forecasting: Part 2

May 24, 2013 | 0utlieR

This is the second part of the forecasting exercise, where I am looking at a multiple regression. To keep it simple I chose the states that boarder WI and the US unemployment information for the regression. Again this is a down and dirty analysis, I wo... [Read more...]

Down and Dirty Forecasting: Part 1

May 24, 2013 | 0utlieR

I wanted to see what I could do in a hurry using the commands found at Forecasting: Principles and Practice . I chose a simple enough data set of Wisconsin Unemployment from 1976 to the present (April 2013). I kept the last 12 months worth of... [Read more...]

Shiny + Concerto = YES !!!

May 23, 2013 | Francis Smart

So I have finally gotten beta access to the two most powerful R controlled web application makers in existence and produced very exciting experimental productsA few posts ago I posted a Visual Reasoning Test that I had made by hand and powered wit... [Read more...]

Robert Hijmans on Spatial Data Analysis

May 23, 2013 | Noam Ross

Last week at the Davis R Users’ Group Robert Hijmans gave a talk about spatial data analysis in R. Robert is a professor of biogeography at UC Davis and the author of the raster (analysis of gridded data), dismo (species distribution modeling), and geosphere (spherical trigonometry), packages. Robert’s presentation ... [Read more...]

7th R/Rmetrics workshop in Switzerland, June 30-July 4

May 23, 2013 | David Smith

The 7th annual R/Rmetrics Workshop om Computational Finance and Financial Engineering will take place June 30-July 4 in the beatiful alpine setting of Lake Thune, Switzerland. This is an intimate workshop limited to around 50 participants, and features tutorials from leading practitioners in finance with R, with a special focus on ... [Read more...]

Package MatchIt: Balancing experimental data

May 23, 2013 | andrew

A balanced experimental design is one in which the distribution of the covariates is the same in both the control and treatment groups. However, although achievable in an experimental scenario, for observational data this ideal is seldom attained. The MatchIt package provides a means of pre-processing data so that the ... [Read more...]

Veterinary Epidemiologic Research: Modelling Survival Data – Non-Parametric Analyses

May 23, 2013 | denishaine

Next topic from Veterinary Epidemiologic Research: chapter 19, modelling survival data. We start with non-parametric analyses where we make no assumptions about either the distribution of survival times or the functional form of the relationship between a predictor and survival. There are 3 non-parametric methods to describe time-to-event data: actuarial life tables, ... [Read more...]

The R-Podcast Episode 13: Interview with Yihui Xie

May 23, 2013 | Eric

It’s an episode of firsts on the R-Podcast! In this episode recorded on location I had the honor and privilege of interviewing Yihui Xie, author of many innovative packages such as knitr and animation. Some of the topics we discussed include: Yihui’s motivation for creating knitr and some ... [Read more...]

xkcd Style Bubble Plot

May 23, 2013 | andrew

A package was recently released to generate plots in the style of xkcd using R. Being a big fan of the cartoon, I could not resist trying it out. So I set out to produce something like one of Hans Rosling’s bubble plots. First I needed some data. Spoilt ... [Read more...]

Investment Portfolio Analysis with R Language

May 22, 2013 | Jack Han

[Please note that this article is for studying R programming purpose only rather than for advices of investment] R has a wide application in finance analysis areas such as time series analysis, portfolio management, and risk management, with its basic functions and many professional packages in Finance. In this article, ... [Read more...]

Vote in the KDnuggets poll on Analytics Software

May 22, 2013 | David Smith

The 14th annual KDnuggets poll measuring use of analytics software is open for voting. The poll asks, "What Predictive Analytics, Big Data, Data mining, Data Science software you used in the past 12 months for a real project?" and allows up to 20 choices from commercial software, open source software, and "big ... [Read more...]
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