1024 search results for "latex"

another X’idated question

February 23, 2012
By
another X’idated question

An X’idated reader of Monte Carlo Statistical Methods had trouble with our Example 3.13, the very one our academic book reviewer disliked so much as to “diverse a 2 star”. The issue is with computing the integral when f is the Student’s t(5) distribution density. In our book, we compare a few importance sampling solutions,

Read more »

A Sequence Clustering Model in R

February 22, 2012
By
A Sequence Clustering Model in R

I’ve just released my first R package! Over the past 1.5 years or so, I’ve been studying an obscure statistical model over ranking (full, or partial) data called Mallows’ model.  It hypothesizes that a set of sequence data has a “modal” sequence about which the data cluster, and that the data fall away from that

Read more »

Taking a Ride on the Wild Function – Introducing the dostats package

February 20, 2012
By

Lately I have been rather productive in my programming and frustrated at the same time. Trying to solve the problems of creating a demographics summary table proved to be a lesson in frustration with R. Since I love R, this was disheartening. I did eventually find the reporttools package which does make a great latex

Read more »

makeR: An R Package for Managing Document Building and Versioning

February 19, 2012
By

If you are reading this vis-à-vis R-Bloggers, then you know how good R, LaTeX, and Sweave are for generating reports and/or conducting reproducible research. It has been particularly valuable for me in Institutional Research where there are many reports that I need to prepare on a regular basis (some monthly, some quarterly, some annually). However, one issue

Read more »

Cross validated question

February 19, 2012
By
Cross validated question

Another problem generated by X’validated (on which I spent much too much time!): given an unbiased coin that produced M heads in the first M tosses, what is the expected number of additional tosses needed to get N (N>M) consecutive heads? Consider the preliminary question of getting a sequence of N heads out of k

Read more »

Mid-February flotsam

February 17, 2012
By
Mid-February flotsam

This coming Monday we start the first semester in Canterbury (and in New Zealand for that matter). We are all looking forward to an earthquake-free year; more realistically, I’d be happy with low magnitude aftershocks. The Wall Street Journal reports … Continue reading →

Read more »

R and presentations: a basic example of knitr and beamer

February 12, 2012
By

Manually combining R code and a presentation can be quite a pain. Luckily, using tools like odfWeave, Sweave and knitr, integrating documents and R code is quite painless. In this post I want to take a look at combining the… See more ›

Read more »

Reading Code

February 10, 2012
By

Code Readability is maybe the most important part of producing reproducible research. If it's impossible (i.e. very costly) for somebody else to read/understand the computer code that underlies your results, then the odds are that they will never be...

Read more »

Coming R meetings in Paris

February 4, 2012
By
Coming R meetings in Paris

If you live in Paris and are interested in R, there will be two meetings for you this week. First a Semin-R session, organized at the Muséum National d’Histoire Naturelle on Tuesday 7 Feb (too bad, the Museum is closed on Tuesdays). Presentations will be about colors, phylogenies and maps, while I will speak about

Read more »

Printing nested tables in R – bridging between the {reshape} and {tables} packages

January 29, 2012
By
Printing nested tables in R – bridging between the {reshape} and {tables} packages

This post shows how to print a prettier nested pivot table, created using the {reshape} package (similar to what you would get with Microsoft Excel), so you could print it either in the R terminal or as a LaTeX table. This task is done by bridging between the cast_df object produced by the {reshape} package,

Read more »