Testing the Hierarchical Risk Parity algorithm

May 26, 2017
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Testing the Hierarchical Risk Parity algorithm

This post will be a modified backtest of the Adaptive Asset Allocation backtest from AllocateSmartly, using the Hierarchical Risk Parity … Continue reading →

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Canada Immigration: Where to settle in? Exercises

May 26, 2017
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Canada Immigration: Where to settle in? Exercises

Many people around the globe would like to immigrate to Canada as a Skilled Worker. These candidates must prove language proficiency in French and English, at least 2 years...

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Who is the caretaker? Evidence-based probability estimation with the bnlearn package

May 26, 2017
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Who is the caretaker? Evidence-based probability estimation with the bnlearn package

by Juan M. Lavista Ferres , Senior Director of Data Science at Microsoft In what was one of the most viral episodes of 2017, political science Professor Robert E...

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Managing Spark data handles in R

May 26, 2017
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Managing Spark data handles in R

When working with big data with R (say, using Spark and sparklyr) we have found it very convenient to keep data handles in a neat list or data_frame. Please...

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Versioning R model objects in SQL Server

May 26, 2017
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High-level info If you build a model and never update it you’re missing a trick. Behaviours change so your model will tend to perform worse over time. You’ve got...

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RQGIS release 1.0.0

May 26, 2017
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RQGIS release 1.0.0

Today we are proud to announce a major release of the RQGIS package providing an interface between R and QGIS. We have completeley rewritten RQGIS by now using reticulate...

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rtdists 0.7-2: response time distributions now with Rcpp and faster

May 26, 2017
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rtdists 0.7-2: response time distributions now with Rcpp and faster

It took us quite a while but we have finally released a new version of rtdists to CRAN which provides a few significant improvements. As a reminder, rtdists rovides...

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MapReduce in Two Modern Paintings

May 25, 2017
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MapReduce in Two Modern Paintings

Two years ago we had a rare family outing to the Dallas Museum of Art (my son is teenager and he's into sport after all)....

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Regular Expression & Treemaps to Visualize Emergency Department Visits

May 25, 2017
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Regular Expression & Treemaps to Visualize Emergency Department Visits

It's been a while since my last post on some TB WHO data. A lot has happened since then, including the opportunity to attend the Open Data Science Conference (ODSC)...

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Shiny Application Layouts Exercises (Part-10)

May 25, 2017
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Shiny Application Layouts Exercises (Part-10)

Shiny Application Layouts – Shiny Themes In the last part of the series we will check out which themes are available in the shinythemes package. More specifically we will...

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CI for difference between independent R square coefficients

May 25, 2017
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CI for difference between independent R square coefficients

In an earlier blog post I provided R code for a CI of a difference in R square for dependent and non-dependent correlations. This was based on a paper...

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Love is all around: Popular words in pop hits

May 25, 2017
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Love is all around: Popular words in pop hits

Data scientist Giora Simchoni recently published a fantastic analysis of the history of pop songs on the Billboard Hot 100 using the R language. Giora used the rvest package...

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The Sierpinski Triangle: Visualising infinity in R

May 24, 2017
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The Sierpinski Triangle: Visualising infinity in R

Using the R programming language to draw the Sierpinski triangle fractal using the chaos game. Drawing a fractal using random numbers. Continue reading → The post

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Prediction intervals for NNETAR models

May 24, 2017
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The nnetar function in the forecast package for R fits a neural network model to a time series with lagged values of the time series as inputs (and possibly...

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Subplots in maps with ggplot2

May 24, 2017
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Subplots in maps with ggplot2

Following the surprising success of my latest post, I decided to show yet another use case of the handy ggplot2::annotation_custom(). Here I will show how to add small graphical...

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Euler Problem 22 : Names Scores

May 24, 2017
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Euler Problem 22 : Names Scores

A proposed solution in the R language to Euler Problem 22. What is the total of all the name scores in the file of 5163 first names? Continue...

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A recipe for dynamic programming in R: Solving a “quadruel” case from PuzzlOR

May 24, 2017
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As also described in Cormen, et al (2009) p. 65, in algorithm design, divide-and-conquer paradigm incorporates a recursive approach in which the main problem is: Divided into smaller sub-problems...

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How brute is your force?: Three ways to get radicals in batch using R

May 24, 2017
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How brute is your force?: Three ways to get radicals in batch using R

Brute force approach to solving a problem is usually the way of running through all possible combinations and repeating a certain calculation. Until a more elegant solution is devised...

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Data wrangling : I/O (Part-1)

May 24, 2017
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Data wrangling : I/O (Part-1)

Data wrangling is a task of great importance in data analysis. Data wrangling, is the process of importing, cleaning and transforming raw data into actionable information for analysis. It...

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Microsoft R Open 3.4.0 now available

May 24, 2017
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Microsoft R Open (MRO), Microsoft's enhanced distribution of open source R, has been upgraded to version 3.4.0 and is now available for download for Windows, Mac, and Linux. This...

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Counterintuitive probability problem of the day

May 24, 2017
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Counterintuitive probability problem of the day

TWO SHOT RUSSIAN ROULETTE WITH 2 BULLETS OR AN EQUAL CHANCE OF 1 or 3 BULLETS With p as the probability of dying on one shot, this figure shows...

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Win an ticket to San Francisco EARL

May 24, 2017
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Win an ticket to San Francisco EARL

This is your chance to win one of two 2-day passes to the first San Francisco EARL Conference on June 6 and 7. To win: All you need to...

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ggeffects: Create Tidy Data Frames of Marginal Effects for ‚ggplot‘ from Model Outputs #rstats

May 24, 2017
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ggeffects: Create Tidy Data Frames of Marginal Effects for ‚ggplot‘ from Model Outputs #rstats

Aim of the ggeffects-package The aim of the ggeffects-package is similar to the broom-package: transforming “untidy” input into a tidy data frame, especially for further use with ggplot. However,…

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6 new Jobs for R users – from all over the world (2017-05-24)

May 24, 2017
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6 new Jobs for R users – from all over the world (2017-05-24)

To post your R job on the next post Just visit this link and post a new R job to the R community. You can post a job for free (and there are also “featured...

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Growth of DataFest over the years

May 23, 2017
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Growth of DataFest over the years

In a previous post, I introduced DataFest and how one can streamline the organization of this event using Google Forms and tools from the tidyverse. In this post,...

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Create smooth animations in R with the tweenr package

May 23, 2017
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Create smooth animations in R with the tweenr package

There are several tools available in R for creating animations (movies) from statistical graphics. The animation package by Yihui Xie will create an animated GIF or video file, using...

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Rcpp 0.12.11: Loads of goodies

The elevent update in the 0.12.* series of Rcpp landed on CRAN yesterday following the initial upload on the weekend, and the Debian package and Windows...

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RStudio Connect 1.5.0 – Introducing Tags!

May 23, 2017
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RStudio Connect 1.5.0 – Introducing Tags!

We’re excited to announce a powerful new ability to organize content in RStudio Connect: version 1.5.0. Tags allow publishers to arrange what they’ve published and enable users to find...

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Only Hours Left to Get 50% off DataCamp

May 23, 2017
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Only Hours Left to Get 50% off DataCamp

This week, DataCamp is celebrating 1 million learners on its platform and is offering 50% off for unlimited access to the full curriculum. Join the learners who have completed...

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