490 search results for "evaluation"

Yikes…It’s Been Awile

December 16, 2014
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Apparently our last blog post was in August. Dang. Where did five months go? Blog guilt would be killing me, but I swear it was just yesterday that Mine posted. I will give a bit of review of some of … Continue reading →

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A comment on preparing data for classifiers

December 4, 2014
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A comment on preparing data for classifiers

I have been working through (with some honest appreciation) a recent article comparing many classifiers on many data sets: “Do we Need Hundreds of Classifiers to Solve Real World Classification Problems?” Manuel Fernández-Delgado, Eva Cernadas, Senén Barro, Dinani Amorim; 15(Oct):3133−3181, 2014 (which we will call “the DWN paper” in this note). This paper applies 179 Related posts:

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RQuantLib 0.4.0

December 2, 2014
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A new major release of RQuantLib is now on CRAN and getting to Debian. All C++ source files have been rewritten to take advantage of newer Rcpp features. Several Fixed Income functions have been added, or refreshed, thanks to contributions by Michele...

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Bio7 2.0 for Windows Released!

December 1, 2014
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Bio7 2.0 for Windows Released!

01.12.2014 A new Windows version of Bio7 is available. Many new features have been added to Bio7 2.0 which is now based on Eclipse 4.4. Highlights are the improved R editor, the R debugging Graphical User Interface (using the standard R debugger), the integrated Java Development Tools (JDT) to create Java simulation models with a

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magrittr 1.5

December 1, 2014
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2014-12-02 22_48_10-Clipboard

(Posted on behalf of Stefan Milton Bache) Sometimes it’s the small things that make a big difference. For me, the introduction of our awkward looking friend, %>%, was one such little thing. I’d never suspected that it would have such an impact on the way quite a few people think and write R (including my

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Twitter’s R package for detecting breakouts in time series

November 24, 2014
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Twitter’s R package for detecting breakouts in time series

With so many more devices and instruments connected to the "Internet of Things" these days, there's a whole lot more time series data available to analyze. But time series are typically quite noisy: how do you distinguish a short-term tick up or down from a true change in the underlying signal? To solve this problem, Twitter created the BreakoutDetection...

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‘Open sourcing’ microsimulation with R

October 23, 2014
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‘Open sourcing’ microsimulation with R

These are the slides from a presentation today at the European conference of the IMA, held in Maastricht, 23rd to 24th October, 2014. Microsimulation, as its name suggests, is about modelling things at the individual-level. In practice, this usually means estimating the characteristics of people using statistical or econometric techniques. Microsimulation, as represented by the International Microsimulation Association...

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Subset replacement in pqR: Now faster and better

October 13, 2014
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Subset replacement in pqR: Now faster and better

The latest version of pqR that I just released uses a new way of implementing subset replacement operations — such as a<-1 or L$M<-v. The new approach is much faster, and eliminates some strange behaviour of the previous approach. This change affects only interpreted code. The bytecode compiler (available since R-2.13.0) introduced a different mechanism, which is

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dplyr 0.3

October 13, 2014
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dplyr 0.3

I’m very pleased to announce that dplyr 0.3 is now available from CRAN. Get the latest version by running: install.packages("dplyr") There are four major new features: Four new high-level verbs: distinct(), slice(), rename(), and transmute(). Three new helper functions between, count(), and data_frame(). More flexible join specifications. Support for row-based set operations. There are two

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Functions and Debugging in R

October 13, 2014
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By Chris Campbell – Senior Consultant, UK. One of the most important objects in R are functions. Functions are a type of object that perform most of the actions we make in R. A quick refresher on objects. > # We … Continue reading →

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