1300 search results for "Excel"

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June 22, 2011
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Let's define a new pattern! I do a lot of programming for research, and part of what this involves is turning calculations, usually expressed as verbs, into nouns. That is, I need to keep the calculation and all it's intermediate steps around so that I can inspect them. Alas, I am programming in Python most of the time and end up...

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sab-R-metrics: Merging Data Sets

June 22, 2011
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I am finally back from Greece and recovered from jet lag. Fortunately, I did not get tear gassed while in Athens, though there were riot police everywhere the whole time we visited. Today, I'm going to start getting my feet wet again with a shorter s...

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A heap of PhD studentships at UCL

June 21, 2011
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A heap of PhD studentships at UCL

Mark Girolami sent me this announcement for six PhD studentships in Statistical Methodology and Its Application at University College London (UCL) that are great opportunities for anyone interested in computational statistics! The studentships are attached to the Department of Statistical Science at University College London, and a subset of them are UCL Impact awards. Impact

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Statistics.com Review

June 20, 2011
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Disclaimer: All prices and classes are approximate and should be confirmed at www.statistics.com as they can change. A comment from my previous post asked me about the experience I had in taking courses from statistics.com (www.statistics.com). To help...

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5000 R questions on stackoverflow.com

June 16, 2011
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The R tag on stackoverflow.com hit a milestone yesterday: 5000 questions about the R language. (The 5000th question was about the fortunes package, incidentally -- thanks to Andrie de Vries for pointing this out on Twitter.) Stackoverflow.com continue...

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RTextTools now 100% Java-free!

When we first wrote RTextTools, we opted to use RWeka for boosting and bagging algorithms for lack of a better alternative. We've discovered that this leads to all sorts of ugly rJava installation issues across platforms and prevents our users from getting started quickly. Recently, we've stumbled upon two excellent non-Java alternatives: LogitBoost in the

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REITs for Everybody Might Now Mean REITs for Nobody

June 12, 2011
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REITs for Everybody Might Now Mean REITs for Nobody

THIS IS MY OPINION AND ANALYSIS AND IS NOT INVESTMENT ADVICE.  YOU ARE RESPONSIBLE FOR YOUR OWN GAINS AND LOSSES. I think REITs traditionally attract conservative dividend investors (grandparents), but due to their recent behavior, REITs also attr...

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The pros and cons of robust data characterizations

The pros and cons of robust data characterizations

Over the years, I have looked at a lot of data contaminated with outliers, the subject of Chapter 7 of Exploring Data in Engineering, the Sciences, and Medicine.  That chapter adopts the definition of an outlier presented by Barnett and Lewis in their book Outliers in Statistical Data 2nd Edition

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Shared Ecological Modelling References

June 6, 2011
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05.06.2011 Today i started to create a list of books and articles about ecological modelling. In this list you will not only find general books about modelling but also books about spatial analysis, image analysis and other (in my opinion) important techniques useful in the context of ecological modelling. For the collection i use “Zotero”

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Visualizing small-scale paired data – combining boxplots, stripcharts, and confidence-intervals in R

June 3, 2011
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Visualizing small-scale paired data – combining boxplots, stripcharts, and confidence-intervals in R

Sometimes when working with small paired data-sets it is nice to see/show all the data in a structured form. For example when looking at pre-post comparisons, connected dots are a natural way to visualize which data-points belong together. In R this can be easily be combined with boxplots expressing the overall distribution of the data.  This

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