3272 search results for "MAP"

Modernizing sugar in Rcpp11

May 26, 2014
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Modernizing sugar in Rcpp11

I'm in the process of modernizing the implementation of sugar in Rcpp11. Previous work already improved performance of sugar by allowing sugar classes themselves to implement how to apply themselves into their target vector. For example the sugar class SeqLen leverages std::iota instead of a manual for loop. template <typename Target> inline...

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A Sequence of 9 Courses on Data Science Starts on Coursera on 2 June and 7 July 2014

May 26, 2014
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A Sequence of 9 Courses on Data Science Starts on Coursera on 2 June and 7 July 2014

A sequence of 9 courses on Data Science will start on Coursera on 2 June and 7 July 2014, to be lectured by(Associate/Assistant) Professors of Johns Hopkins University. The courses are designed for students to learn to become Data Scientists … Continue reading →

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Comparing Holt Winters Implementations in R – Part 1

May 24, 2014
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Comparing Holt Winters Implementations in R – Part 1

This a multipart series aiming to compare and contrast the various Holt Winters implementations in R. We intend to focus more on the practical and applied aspects of the implementations to get a better grip over the behaviour of models … Continue reading →

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A taste of functional programmming in Rcpp11

May 23, 2014
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@kevinushey requested some functional programming in Rcpp11 and provided initial versions of map and filter. map is actually doing exactly the same thing as mapply so I added map as a synonym to mapply so that we can do (see this previous post for details): // ] NumericVector mapply_example(NumericVector x, NumericVector y, double z){ ...

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Quick History 2: GLMs, R and large data sets

May 22, 2014
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by Joseph Rickert In last week’s post, I sketched out the history of Generalized Linear Models and their implementations. In this post I’ll attempt to outline how GLM functions evolved in R to handle large data sets. The first function to make it possible to build GLM models with datasets that are too big to fit into memory was...

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R and Python Meetups, Philippines

May 21, 2014
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There will be upcoming meetups for R User Group Philippines and Python Philippines (PythonPH) Community. Below are the details:R Meetuptopic: R for SAS users, and planning of RUG activities venue: 9/F Sun Life Centre, 5th Avenue corner Rizal Drive...

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Allez les Bleus !

May 20, 2014
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Allez les Bleus !

In almost three weeks, the (FIFA) World Cup will start, in Brazil. I have to admit that I am not a big fan of soccer, so I will not talk to much about it. Actually, I wanted to talk about colors, and variations on some colors. For instance, there are a lot of blues. In order to visualize standard...

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ICU Unicode text transforms in the R package stringi

May 20, 2014
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The ICU (International Components for Unicode) library provides very powerful and flexible ways to apply various Unicode text transforms. These include: Full (language-specific) case mappings, Unicode normalization, Text transliteration (e.g. script-to-script conversion). All of these are available to R programmers/users…Read more ›

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Ensemble Methods Part 3: Revolution Analytics Big Data Random Forest Function

May 20, 2014
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Ensemble Methods Part 3: Revolution Analytics Big Data Random Forest Function

by Mike Bowles In two previous posts, A Thumbnail History of Ensemble Methods and Ensemble Packages in R, Mike Bowles — a machine learning expert and serial entrepreneur — laid out a brief history of ensemble methods and described a few of the many implementations in R. In this post Mike takes a detailed look at the Random Forests...

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taxize v0.3.0 update – a new data source, taxonomy in writing, and uBio examples

May 20, 2014
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We just released v0.3 of taxize. For details on the update, see the release notes. Some new features New function iplant_resolve() to do name resolution using the iPlant name resolution service. Note, this is different from http://taxosaurus.org/ that is wrapped in the tnrs() function. New function ipni_search() to search for names in the International Plant Names Index (IPNI). See...

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