1 Description The weak law of large numbers is a result in probability theory also known as Bernoulli’s

In mixture experiments there is a constraint that the variables are the proportions of components that are mixed together with the consequence that these proportions sum to one. When fitting regression models to data from mixture experiments we may be interested in reprenting the fitted model with a surface plot. The constraint on proportions means

One of my students wrote the following code for his R exam, trying to do accept-reject simulation (of a Rayleigh distribution) and constant approximation at the same time: which I find remarkable if alas doomed to fail! I wonder if there exists a (real as opposed to fantasy) computer language where you could introduce constants

Today when I reminded a friend not to lose hope in Indian cricket (after recent whitewash in England and Australia), another friend commented, प्रसून जी , यह भारतीय क्रिकेट है ..यहाँ पर हर विक्टरी दुसरे दिन पुरानी हो जाती है ...You have to perform at your best ... After all they are getting unexpected money. They should deliver the...

(This article was first published on twotorials by anthony damico, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: twotorials by anthony damico. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

(This article was first published on twotorials by anthony damico, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on his blog: twotorials by anthony damico. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

The worldwide R user conference, useR! 2012, will take place this year June 12-15 in Nashville, Tennessee. In addition to the regular program of invited and contributed talks, a highlight of every useR! is the pre-conference tutorials: hand-on, half-day in-depth expert-led sessions with a focused on a specific area of methodology with R. This year's roster of tutorials has...

Re-posting this blog from my other blog on Analytics (http://allthingsbusinessanalytics.blogspot.com/)Did Netflix make a bad move or a bold move, only time will tell but for now here is a simple sentiment analysis using R and TwitteR pac...

LaTeX is a typesetting system that can easily be used to create reports and scientific articles, and has excellent formatting options for displaying code and mathematical formulas. Sweave is a package in base R that can execute R code embedded in LaTeX files and display the output. This can be used to generate reports and quickly fix...

The 8th international R users conference useR! 2012 will be in Nashville TN USA June 12-15 with a special all-day pre-conference course from Bill Venables on June 11. We have a terrific lineup of half-day tutorials on June 12 and will have invited and contributed presentations of interest to a wide variety of R users. Details may be found...

A while back I wrote a blog post on the R package I wrote for reading and manipulating grads data. The library is quite basic, and does not support a number of grads data file options: Using one ctl file,… See more ›

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,

I’ve been writing a fair amount of R recently and have been going through a good learning period, here are some functions that I’ve discovered (mainly plyr and reshape related) and thought I would share: merge_all is a good way to merge multiple different data frames, rather than multiple merge commands. The key thing is … Continue reading...

I was a bit annoyed by the error when loading a dataset that contains multi-byte characters. R basically just chokes on them. I have not really understood the intricacies of this, but it was basically just an annoyance and since I did not really use these characters in the strings containing them, I just wanted