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Bringing the powers of SQL into R

By Lionel Hertzog One of the big flaw of R is that data loaded into it are stored in the memory (on the RAM) and not on the disk. As you are working in an analysis with large (big) data the processing...

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The ‘lost boarding pass’ puzzle: efficient simulation in R

By David Robinson A family member recently sent me a puzzle: One hundred people are lined up with their boarding passes showing their seats on the 100-seat Plane. The first guy in line drops his pass...

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R 3.2.3 released

By David Smith Yesterday, the R Core Team released a new update to R (version 3.2.3, codenamed “Wooden Christmas Tree”), and the source distribution is now available for download on CRAN. Binary...

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Importance of exports and economic growth, cross-country time series

By Peter’s stats stuff – R Exports and economic growth I was looking to show a more substantive piece of analysis using the World Development Indicators data, and at the same time show how to get...

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Modeling and Solving Linear Programming with R – Free book

By Tal Galili Modeling and Solving Linear Programming with R (pdf – free download link) is a book about solving linear programming problems/exercises with R. This book provides a brief introduction to...

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Win-Vector news

By John Mount Just an update of what we have been up to lately at Win-Vector LLC, and a reminder of some of our current offerings. It has been busy lately (and that is good). Our current professional...

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Calculate Leave-One-Out Prediction for GLM

By statcompute In the model development, the “leave-one-out” prediction is a way of cross-validation, calculated as below:1. First of all, after a model is developed, each observation used in the model...

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R 3.2.3 is released (with improvements for Windows users, and general bug fixes)

By Tal Galili R 3.2.2 (codename “Wooden Christmas Tree”) was released several days ago. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new...

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R 3.2.3 is released (with improvements for Windows users, and general bug fixes)

By Tal Galili R 3.2.2 (codename “Wooden Christmas Tree”) was released several days ago. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new...

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“Why do people contribute to the R?” – concolusions from a new PNAS article

By Tal Galili tl;dr: People contribute to R for various reasons, which evolves with time. The main reasons appear to be: “fun coding”, personal commitment to the community, interaction with like-minded...

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“Why do people contribute to the R?” – concolusions from a new PNAS article

By Tal Galili tl;dr: People contribute to R for various reasons, which evolves with time. The main reasons appear to be: “fun coding”, personal commitment to the community, interaction with like-minded...

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Fear of WaPo Using Bad Pie Charts Has Increased Since Last Year

By hrbrmstr library(tidyr) library(ggplot2) library(ggthemes) library(scales) library(dplyr) # Easiest way to transcribe the PDF table # The slope calculation will enable us to color the lines/points...

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Plotting Scopus article level citation data in R

By Daniel Lakens The Royal Society has decided to publish journal citations distributions. This makes sense. The journal impact factor is a single number trying to summarize a distribution, but it’s...

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Maintaining a database of price files in R

By The R Trader Doing quantitative research implies a lot of data crunching and one needs clean and reliable data to achieve this. What is really needed is clean data that is easily accessible (even...

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In case you missed it: November 2015 roundup

By David Smith In case you missed them, here are some articles from November of particular interest to R users. You can use emojis as plotting symbols in ggplot2 charts with the emoGG package. A review...

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Data Science Radar – Technologist Profile

By Mango Blogger by Mark Sellors, Mango Solutions @sellorm Mark Sellors from Mango took the Data Science Radar Challenge and his dominant skill was a Technologist, so we asked him a few questions. 1....

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Phyllotaxis By Shiny

By aschinchon Antonio, you don’t know what empathy is! (Cecilia, my beautiful wife) Spirals are nice. In the wake of my previous post I have done a Shiny app to explore patterns generated by changing...

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R and Python: Theory of Linear Least Squares

By Al-Ahmadgaid Asaad In my previous article, we talked about implementations of linear regression models in R, Python and SAS. On the theoretical sides, however, I briefly mentioned the estimation...

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In case you missed it: November 2015 roundup

By David Smith In case you missed them, here are some articles from November of particular interest to R users. You can use emojis as plotting symbols in ggplot2 charts with the emoGG package. A review...

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Making Sense of Logarithmic Loss

By Andrew Collier Logarithmic Loss, or simply Log Loss, is a classification loss function often used as an evaluation metric in kaggle competitions. Since success in these competitions hinges on...

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