388 search results for "evaluation"

Spatial Randomness Evaluation in R: Monte Carlo Test

May 14, 2012
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Spatial Randomness Evaluation in R: Monte Carlo Test

This post is a some kind of reply to this one.So our goal is to determine whether our point process is random or not. We will use R and spatstat package in particular. Spatstat provides a very handy function for this, that uses K-function combined with...

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Are students’ teaching evaluations influenced by instructors’ looks?

August 3, 2011
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Are students’ teaching evaluations influenced by instructors’ looks?

Are students' teaching evaluations influenced by instructors' looks? ggplot2 may help find the answer.The recent release of RcmdrPlugin.KMggplot2 has made ggplot2 available to those who prefer GUI to the command line interface. With the new plugin for ...

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Forecast estimation, evaluation and transformation

November 9, 2010
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Forecast estimation, evaluation and transformation

I’ve had a few emails lately about forecast evaluation and estimation criteria. Here is one I received today, along with some comments. I have a rather simple question regarding the use of MSE as opposed to MAD and MAPE. If the parameters of a time series model are estimated by minimizing MSE, why do we

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RSI(2) Evaluation

June 28, 2009
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RSI(2) Evaluation

Despite my best efforts, it's been a month since the last post of this series. The first post replicated this simple RSI(2) strategy from the MarketSci Blog using R. The second post showed how to replicate the strategy that scales in/out of RSI(2). ...

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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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