September 2009

R: The Dummies Package

September 30, 2009 | Christopher Brown

R-2.9.2 was released in August. While R can be considered stable and battle-ready, it is also far from stagnation. It is humbling to see such an intelligent and vibrant community helping CRAN grow faster than ever. Every day I see a new package or read a new comment on R-Help [...] [Read more...]

Examples using R – Analysis of Variance

September 30, 2009 | R – StudyTrails

Problem: A product development engineer is interested in investigating the tensile strength of a new synthetic fiber that will be used t omake cloth for men’s shirts. The engineer knows from previous experience that the strength is affected by he weight percent of cotton used in the blend of ... [Read more...]

Example 7.14: A simple graphic of sales

September 29, 2009 | Ken Kleinman

In this example, we show a simple plot of the sales rank data read in as shown in example 7.13.SASIn SAS, we use the symbol statement (section 5.3) to request small (with the h option) dots (with the v option, and that the dots not be connected (with the i option. (...
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WordPress Blogging with R in 3 Steps

September 29, 2009 | learnr

A few people have emailed me and enquired about the use of tools mentioned at the end of this post to make blogposts with embedded R-commands. Below is a small step-by-step walkthrough of how to accomplish this. Write your blog post in a simple tex... [Read more...]

Survive R

September 29, 2009 | John Mount

New PDF slides version (presented at the Bay Area R Users Meetup October 13, 2009). We at Win-Vector LLC appear to like R a bit more than some of our, perhaps wiser, colleagues ( see: Choose your weapon: Matlab, R or something else? and R and data ). While we do like R (see: ... [Read more...]

Blogs on R | Statistics

September 28, 2009 | Jeromy Anglim

What are the current blogs on R? What do they cover?What makes a good blog on R?Of course different readers look for different things, but for me a good blog on R:Provides a Gateway: The blog discovers and shares useful external material and expla...
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Psychology Statistics 101 | R or SPSS

September 28, 2009 | Jeromy Anglim

Dan Wright has placed his Quantitative Methods 1 course online. The course offers instructions both in R and SPSS (PASW).It is an interesting case study in  how to integrate R into a psychology quantitative methods course at the undergraduate leve...
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How to Import MS Excel Data into R

September 26, 2009 | Yihui Xie

s Sir Francis Bacon said, “Histories make men wise; poets witty; the mathematics subtile; natural philosophy deep; moral grave; logic and rhetoric able to contend.” And Windows stupid. He should have added the last sentence if he were a Windows user in this age. 1. Avoid Using M$ Excel A lot ...
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Non-parametric Methods

September 24, 2009 | rtutor.chiyau

A statistical method is called non-parametric if it makes no assumption on the population distribution or sample size. This is in contrast with most parametric methods in elementary statistics that assume the data is quantitative, the population... [Read more...]

digest 0.4.0 and 0.4.1

September 24, 2009 | Thinking inside the box

After almost two years, I just made a small update to the digest package for R by adding sha-256 as another supported hashing function. While at this, a few minor edits where made here or there. Version 0.4.0 also included a file src/ b... [Read more...]

R Function of the Day: cut

September 23, 2009 | erik

This post originally appeared on my Wordpress blog on September 23, 2009. I present it here in its original form. The R Function of the Day series will focus on describing in plain language how certain R functions work, focusing on simple ex... [Read more...]

ggplot2: Back-to-back Bar Charts

September 23, 2009 | learnr

On the ggplot2 mailing-list the following question was asked: How to create a back-to-back bar chart with ggplot2? For anyone who don’t know what I am talking about, have a look on a recent paper from the EU. I’d like to create plots like the graph...
[Read more...]

High yield spread

September 23, 2009 | kafka

Last week I had opportunity to participate at NYU, where one of the lecturers was Z-score man’s. He spent same time talking about the high yield spread as measure of the macro economy. Then spread is high (junk bonds become very cheap and Treasuries become ‘gold’) -  crisis is ...
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