# 362 search results for "evaluation"

## Bio7 2.0 for Windows Released!

December 1, 2014
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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

## magrittr 1.5

December 1, 2014
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(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

## Twitter’s R package for detecting breakouts in time series

November 24, 2014
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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...

## ‘Open sourcing’ microsimulation with R

October 23, 2014
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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...

## Subset replacement in pqR: Now faster and better

October 13, 2014
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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

## dplyr 0.3

October 13, 2014
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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

## 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 →

## R as a general-purpose language for creating DSLs

October 6, 2014
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As a computer scientist, RStudio's Joe Cheng has some great insights into the R language and how it compares with other programming language. In the interview with DataScience.LA below, he notes that while R is often thought about as a domain-specific language (or DSL), the combination of a functional language with deferred evaluation of functional arguments actually makes it...

## Error propagation based on interval arithmetics

September 27, 2014
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$Error propagation based on interval arithmetics$

I added an interval function to my ‘propagate’ package (now on CRAN) that conducts error propagation based on interval arithmetics. It calculates the uncertainty of a model by using interval arithmetics based on (what I call) a “combinatorial sequence grid evaluation” approach, thereby avoiding the classical dependency problem that often inflates the result interval. This