1142 search results for "excel"

I can’t resist a word cloud: now using R!

July 28, 2011
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I can’t resist a word cloud: now using R!

The wordcloud package is word clouds for R with a difference: they look great. Of course, having just analysed online coverage of the ISMB conference, I had to run all 6 906 comments from the 2008-2011 meetings through some code. If you followed along via the Sweave code, I went as far as generating the

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The Stats Clinic

July 27, 2011
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The Stats Clinic

Here at HSL we have a lot of smart kinda-numerate people who have access to a lot of data. On a bad day, kinda-numerate includes myself, but in general I’m talking about scientists who have have done an introductory stats course, but not much else. When all you have is a t-test, suddenly everything looks

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The R-Files: Jeff Ryan

July 25, 2011
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The R-Files: Jeff Ryan

"The R-Files" is an occasional series from Revolution Analytics, where we profile prominent members of the R Community. Name: Jeff Ryan Profession: Owner/Principal at Lemnica; Committee Member at R/Finance Nationality: American Years Using R: 8 Known for: R/Finance Conference, quantmod and xts packages Jeffrey Ryan is a Chicago-based quantitative software analyst and avid R user. He is perhaps best...

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Registration closing for UseR! 2011

July 18, 2011
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Registration closing for UseR! 2011

Friday July 22 is the last day on which you can register for UseR! 2011 at the University of Warwick.  The conference will be 2011 August 16-18. You can peruse the book of abstracts and view the draft schedule. I am scheduled to give a talk on “Random input testing with R”.  The abstract is: … Continue reading...

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Model Validation: Interpreting Residual Plots

July 18, 2011
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Model Validation: Interpreting Residual Plots

When conducting any statistical analysis it is important to evaluate how well the model fits the data and that the data meet the assumptions of the model. There are numerous ways to do this and a variety of statistical tests to evaluate deviations from model assumptions. However, there is little general acceptance of any of the statistical tests. Generally...

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Correlation Resources: SPSS, R, Causality, Interpretation, and APA Style Reporting

July 17, 2011
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This post provides links to a range of resources related to the use and interpretation of correlations. I wanted to provide a page with links to a number of additional resources that would be useful both for those of my students who might be keen to le...

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Review: Financial Risk Forecasting – The Theory and Practice of Forecasting Market Risk, with Implementation in R and MATLAB by Jon Danielsson

July 16, 2011
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Guest post to R-bloggers by Dr Kris Boudt. ——————– R has always been my favorite language to forecast financial risk in my research and consulting. But, I have been reluctant to use it in my lectures on financial risk. It is certainly not the absence of appropriate R packages that refrained me. On the contrary, there is a large...

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MCMC and faster Gibbs Sampling using Rcpp

July 14, 2011
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Sanjog Misra, who uses Rcpp for Monte Carlo Markov Chain (MCMC) analyses in quantitative marketing, kindly set me a short example of Rcpp use.The example is based on a blog post by Darren Wilkinson which itself discusses and compares the suitabilit...

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XLConnect 0.1-5

July 11, 2011
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XLConnect 0.1-5

Mirai Solutions GmbH (http://www.mirai-solutions.com) is pleased to announce the availability of XLConnect 0.1-5. This release adds the following new features: Support for setting/getting cell formulas. See methods set/getCellFormula. Support for setting/getting the force formula recalculation flag on worksheets. See methods … Continue reading →

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Creating 3D geographical plots in R using RGL

July 11, 2011
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Creating 3D geographical plots in R using RGL

I've been playing around with the rgl package in the last week, as part of an ongoing quest to come up with nice-looking (but more importantly, useful) data vizualisations. It's a nice little package, and once you've run through the excell...

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