September 2012

Testing highlight.js with R code

September 12, 2012 | jkunst.com: Posts for category R

I searched for a javascript plugin to highlighter code, but obviously not any code. I needed to higlight R. Finally I founded highlight.js. Highlights.js is pretty cool for many reasons. I like Highlights.js because: Support R lenguage. It's easy to use. Works automatically. That's mean you don't ... [Read more...]

Computational Finance with R on Coursera

September 12, 2012 | Joshua Ulrich

If you haven't signed up for the Introduction to Computational Finance and Financial Econometrics course taught by Eric Zivot on Coursera, it's not too late.  The second week just started and the first assignments aren't due until September 18th.J... [Read more...]

Tutorials for Learning Visualization in R

September 12, 2012 | David Smith

Today's guest post comes from Nathan Yau. Nathan runs FlowingData, a site on statistics and visualization, and is the author of Visualize This. Years ago, when I started FlowingData, the purpose of the blog was to catalog and think out loud about visualization, in its many varieties. In the beginning ... [Read more...]

Association and concordance measures

September 12, 2012 | arthur charpentier

Following the course, in order to define assocation measures (from Kruskal (1958)) or concordance measures (from Scarsini (1984)), define a concordance function as follows: let be a random pair with copula , and with copula . Then define the so-... [Read more...]

Great Circles, Black Holes, and Community Events Part 2 of 3

September 12, 2012 | 0utlieR

This post will examine the Heber Valley Railroad, a small town tourist attraction using event gravitational pull. Using the information from part 1 the two factors associated with the events gravity, the number of participants, and the distance they traveled. The number of participants can be shown using bar charts, histograms, ... [Read more...]

Let’s go! (and Disclaimer)

September 12, 2012 | Sascha W.

Let's get that started ...Fun stuff with R coming soon!Disclaimer beforehand:The analyses I'll present are not meant to be taken too seriously in a scientific way. I just wanna show what you can do with R as a programming language, basic statistics and... [Read more...]

How to check your package with R-devel

September 12, 2012 | FelixS

In response to an update to ggplot2 (now verson 0.9.2) I had to make some minor changes to our package TripleR. The CRAN maintainers also asked to … Please also fix other issues that may be apparent in checks with a current R-devel. Now, how can this be done? Here’s my ... [Read more...]

One-Way ANOVA

September 11, 2012 | Wesley

One-Way ANOVA Analysis of variance is a tool used for a variety of purposes. Applications range from a common one-way ANOVA, to experimental blocking, to more complex nested designs. This first ANOVA example provides the necessary tools to analyze data using this technique. This example will show a basic one-way ... [Read more...]

wordcloud makes words less cloudy

September 11, 2012 | Ian

  An update to the wordcloud package (2.2) has been released to CRAN. It includes a number of improvements to the basic wordcloud. Notably that you may now pass it text and Corpus objects directly. as in: #install.packages(c("wordcloud","tm"),repos="http://cran.r-project.org") library(wordcloud) library(tm) wordcloud("... [Read more...]

Fund Now or Buy Later? A Kickstarter Price Comparison

September 11, 2012 | preeya

Hi Internet! I’m Preeya, and I will be your guide in this blog’s quantitative quest for knowledge. To get started, let’s talk about pricing. Part of the Kickstarter process is figuring out how much a hypothetical product will cost once it’s on the market. But how ... [Read more...]

Integrate data and reporting on the Web with knitr

September 11, 2012 | David Smith

Today's guest post comes from Yihui Xie, author of the knitr package — ed. Hi, this is Yihui Xie, and I'm guest posting on the Revolutions blog to talk about one aspect of the knitr package: how we can integrate data analysis and reporting in R with the Web. This post ... [Read more...]

Extending Gold time series

September 10, 2012 | systematicinvestor

While back-testing trading strategies I want all assets to have long history. Unfortunately, sometimes there is no tradeable stock or ETF with sufficient history. For example, I might use GLD as a proxy for Gold allocation, but GLD is only began trading in November of 2004. We can extend the GLD’... [Read more...]

PDF and CDF for normal distributions with R

September 10, 2012 | édouard

Below, we give the R code to plot the PDF and the CDF for normal distributions. We wish to get charts quite similar to the ones read on Wikipedia (Normal Distribution). The resulting charts are shown at the bottom. Notice that … Continue reading → [Read more...]
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