1421 search results for "Excel"

audiolyzR: Data sonification with R

January 13, 2013
By
audiolyzR: Data sonification with R

In his talk “Give Your Data A Listen” at last summer’s useR! 2012 conference, Eric Stone presented joint work with Jesse Garrison on audiolyzR, an R package for “data sonification.” I thought this was a nifty and well-executed idea. Since I haven’t seen … Continue reading →

Read more »

Huge Discount on Kindle Academic Texts at Amazon — Today Only

January 13, 2013
By

Anyone who collects academic texts knows that the hobby can be a bit expensive.  Well, today I happened to notice that there is an incredible deal on Amazon's Gold Box Deal for today for many kindle academic books.  And they are not just unpo...

Read more »

Examples of Current Major Market Clusters

January 11, 2013
By
Examples of Current Major Market Clusters

I want to follow up and provide a bit more details to the excellent “A Visual of Current Major Market Clusters” post by David Varadi. Let’s first load historical for the 10 major asset classes: Gold ( GLD ) US Dollar ( UUP ) S&P500 ( SPY ) Nasdaq100 ( QQQ ) Small Cap (

Read more »

(not provided): Using R and the Google Analytics API

January 11, 2013
By
(not provided): Using R and the Google Analytics API

For power users of Google Analytics, there is a heavy dose of spreadsheet work that accompanies any decent analysis.  But even with Excel in tow, it’s often difficult to get the data just right without resorting to formula hacks and manual table formatting.  This is where the Google Analytics API and R can come very (not provided): Using...

Read more »

Shiny = Happy People

January 11, 2013
By

The people behind the wonderful RStudio, which I gushed about in a previous post, have developed a new package, Shiny, that makes it easy to develop interactive web applications with R. Shiny is not the first package to facilitate building web apps with R (see here for comparison of Shiny and gWidgetsWWW2.rapache), but it is

Read more »

DC R Meetup: “Analyze US Government Survey Data with R”

January 10, 2013
By
DC R Meetup: “Analyze US Government Survey Data with R”

I really enjoyed tonight’s DC R Meetup, presented by the prolific Anthony Damico. I’ve met Anthony before to discuss whether the Census Bureau could either… publish R-readable … Continue reading →

Read more »

R for actuarial science

January 10, 2013
By
R for actuarial science

As mentioned in the Appendix of Modern Actuarial Risk Theory, “R (and S) is the ‘lingua franca’ of data analysis and statistical computing, used in academia, climate research, computer science, bioinformatics, pharmaceutical industry, customer analytics, data mining, finance and by some insurers. Apart from being stable, fast, always up-to-date and very versatile, the chief advantage of R is that...

Read more »

Getting Access data into R

January 9, 2013
By

Item Response Modeling of Customer Satisfaction: The Graded Response Model

January 8, 2013
By
Item Response Modeling of Customer Satisfaction:  The Graded Response Model

After several previous posts introducing item response theory (IRT), we are finally ready for the analysis of a customer satisfaction data set using a rating scale.  IRT can be multidimensional, and R is fortunate to have its own package, mirt, with excellent documentation (R.Philip Chalmers).  But, the presence of a strong first principal...

Read more »

Annoucing the Rcpp Gallery

January 8, 2013
By

Earlier this morning, JJ announced what we had been working on for the last few weeks: the Rcpp Gallery. Now, as our luck will have it, the Rcpp-devel list received his message but did not transmit it for an apparent mail system outage at WU Vienna:...

Read more »