395 search results for "evaluation"

Stress testing

July 6, 2015
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Stress testing

Lately, we've been spending a lot of time "stress-testing" our method for the computation of the Expected Value of Partial Perfect Information (EVPPI $-$ I know: the terminology is a bit strange and possibly not-very helpful, as "perfect" information d...

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Review: Machine Learning with R Cookbook

July 3, 2015
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"Machine Learning with R Cookbook" by Chiu Yu-Wei is nothing more or less than it purports to be: a collection of 110 recipes for applying Data Analysis and Machine Learning techniques in R. I was asked by the publishers to review this book and found it to be an interesting and informative read. It will The post

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useR 2015: Romain Francois: My R adventures

July 1, 2015
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useR 2015: Romain Francois: My R adventures

Using R since 2002 and has been working on Rcpp, Rcpp11, Rcpp14 and dplyr internals. Worked on a number of big projects. 2005 he set up the R Graph Gallery 2009 worked on rJava 2010 Rcpp 2013 dplyr Key themes are Performance and usabililty rJava 0.7-* Creating objects was messy d <-jnew("java/lang/Double", 42 .jcal(d, "D",

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Modeling Interest Rates Meucci Style

June 24, 2015
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Modeling Interest Rates Meucci Style

I have signed up for Attilio Meucci’s ARPM Bootcamp next month (July 13-18) in NYC http://www.symmys.com/arpm-bootcamp, and need to do quite a bit of prep as it’s going to be a deep-dive…The Advanced Risk and Portfolio Management Bootcamp provides in-depth understanding of buy-side modeling from the foundations to the most advanced statistical and optimization techniques, in 6...

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Looking for Preference in All the Wrong Places: Neuroscience Suggests Choice Model Misspecification

June 22, 2015
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Looking for Preference in All the Wrong Places: Neuroscience Suggests Choice Model Misspecification

At its core, choice modeling is a utility estimating machine. Everything has a value reflected in the price that we are willing to pay in order to obtain it. Here are a collection of Smart Watches from a search of Google Shopping. You are free to click...

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advanced.procD.lm for pairwise tests and model comparisons

June 9, 2015
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In geomorph 2.1.5, we decided to deprecate the functions, pairwiseD.test and pairwise.slope.test.   Our reason for this was two-fold.  First, recent updates by CRAN rendered these functions unstable.  These functions depended on the mode...

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analyze the trends in international mathematics and science study (timss) with r

June 9, 2015
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an underexplored chest of international quantitative aptitude testing, the trends in international mathematics and science study (timss) would make any pearson stockholder smile.  examining the mathematical mastery of more than 600,000 students fr...

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analyze the progress in international reading literacy study (pirls) with r

June 8, 2015
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an uncharted world of international reading comprehension information, the progress in international reading literacy study (pirls) would make any ets executive blush. testing the educational chops of more than 300,000 students from nearly fifty count...

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Why has R, despite quirks, been so successful?

June 8, 2015
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I was on a panel back in 2009 where Bow Cowgill said, "The best thing about R is that it was written by statisticians. The worst thing about R is that it was written by statisticians." R is undeniably quirky — especially to computer scientists — and yet it has attracted a huge following for a domain-specific language, with...

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My aversion to pipes

June 3, 2015
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At the risk of coming across as even more of a curmudgeonly old fart than people already think I am, I really do dislike the current vogue in R that is the pipe family of binary operators; e.g. %>%. Introduced by Hadley Wickham and popularised and advanced via the magrittr package by Stefan Milton Bache, the basic idea...

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