October 2015

RcppRedis 0.1.6

October 6, 2015 | Thinking inside the box

An incremental RcppRedis release arrived on CRAN yesterday. Russell Pierce contributed four new function for pushing and popping to/from lists, and added authentication support. I added a simple ping command as well. Changes in version 0.1.6 (2015-... [Read more...]

Introduction to Logistic Regression with R

October 6, 2015 | suresh kumar Gorakala

In my previous blog I have explained about linear regression. In today’s post I will explain about logistic regression.         Consider a scenario where we need to predict a medical condition of a patient (HBP) ,HAVE HIGH BP or NO HIGH BP, based on some observed symptoms – Age, weight, Issmoking, ... [Read more...]

rchess a Chess Package for R

October 6, 2015 | Joshua Kunst

A lot time ago I wonder for some R package for chess. Python, JS, Java, C have chess libraries, why R not? But then the htmlwidgets and V8 packages were born and now possibilities are almost endless. Anyone can make a wrapper for a JS library :D. And this is ... [Read more...]

Using miniCRAN on site in Iran

October 6, 2015 | Andrie de Vries

by Jens Carl Streibig, Professor Emeritus at University of Copenhagen Editor's introduction: for background on the miniCRAN package, see our previous blog posts: Introducing miniCRAN Using R in Myanmar MiniCRAN saves my neck when out in regions where seamless running internet is and exception rather than the rule. R is ... [Read more...]

An example of a trading strategy coded in R

October 6, 2015 | R programming

Back-testing of a trading strategy can be implemented in four stages. Getting the historical data Formulate the trading strategy and specify the rules Execute the strategy on the historical data Evaluate performance metrics In this post, we will back-test our trading strategy in R. The quantmod package has made it ... [Read more...]

R in Insurance 2016

October 6, 2015 | R on mages' blog

Following the successful 3rd R in Insurance conference in Amsterdam this year, we will return to London next year. We will be back at Cass Business School, 11 July 2016. The event will focus again on the use of R in insurance, bringing together experts... [Read more...]

Amanda Cox on using R at the NYT

October 5, 2015 | David Smith

For more than six years, the New York Times has been using the R language to develop and implement much of the fantastic data journalism on the website and in the newspaper. A few months ago graphics editor Amanda Cox was interviewed for the Data Stories podcast, where she described ... [Read more...]

Using differential privacy to reuse training data

October 5, 2015 | John Mount

Win-Vector LLC‘s Nina Zumel wrote a great article explaining differential privacy and demonstrating how to use it to enhance forward step-wise logistic regression. This allowed her to reproduce results similar to the recent Science paper “The reusable holdout: Preserving validity in adaptive data analysis”. The technique essentially protects and ...
[Read more...]

Undirected Graphs When the Causality Is Mutual

October 5, 2015 | Joel Cadwell

Structural equation models impose causal order on a set of observations. We start with a measurement model: a list of theoretical constructs and a table assigning what is observed (manifest) to what is hidden (latent). Although it is possible to think of this assignment as formative rather than reflective, the ... [Read more...]

Free R Help: October Edition

October 5, 2015 | Ari Lamstein

Last Month I offered 10 slots of Free R Help and the response was overwhelming. About 100 people requested slots, which was much more than I expected. Many of the people who I helped had taken online R courses such as the Coursera Data Science Specialization, but were struggling with applying what ... [Read more...]

Replicating NatGeo’s “Proper” Earthquake Map in R

October 4, 2015 | hrbrmstr

I saw this post over at NatGeo over the weekend and felt compelled to replicate this: with ggplot2. Three shapefiles later and we have it close enough to toss into a post (and I really don’t believe the continent names are necessary). library(rgdal) library(ggplot2) library(ggthemes)   # grab ...
[Read more...]

RcppArmadillo 0.6.100.0.0

October 4, 2015 | Thinking inside the box

The somewhat regular monthly upstream Armadillo update brings us a first release of the 6.* series. This follows an earlier test release announced on the list, and released to the Rcpp drat. And as version 6.100.0 was released on Friday by Conrad, we rolled it into RcppArmadillo release 0.6.100.0.0 yesterday. Following yet another ... [Read more...]

Imputing missing data with R; MICE package

October 4, 2015 | Michy Alice

Missing data can be a not so trivial problem when analysing a dataset and accounting for it is usually not so straightforward either. If the amount of missing data is very small relatively to the size of the dataset, then leaving out the few samples with missing features may be ... [Read more...]

Predicting Titanic deaths on Kaggle VII: More Stan

October 4, 2015 | Wingfeet

Two weeks ago I used STAN to create predictions after just throwing in all independent variables. This week I aim to refine the STAN model. For this it is convenient to use the loo package (Efficient Leave-One-Out Cross-Validation and WAIC for Bayesian Models). See also the paper by Aki Vehtari, ... [Read more...]
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