Together with David Kellen I am currently working on an introductory chapter to mixed models for a book edited by Dan Spieler and Eric Schumacher (the current version can be found here). The goal is to provide a theoretical and practical introduction that is targeted mainly at experimental psychologists, neuroscientists, and others working with experimental
This is the third part of the series on Instrumental Variables. For other parts of the series follow the tag instrumental variables. In this exercise set we will use...
Bioinformatics is an amalgamation Biology and Computer science.Biological Data is manipulated using Computers and Computer software’s in Bioinformatics. Biological Data includes DNA; RNA & Proteins. DNA & RNA is...
Last year, I was able to sit back and lazily “RT” Julia Silge’s excellent retrospective on her 2016 @rOpenSci “unconference” experience. Since Julia was not there this year, and...
A reviewer asked me to report detailed running times for all (so many :scream:) performed computations in one of my papers, and so I spent a Saturday morning figuring...
Contributed by Bo Lian. This blog post is the first class project on Exploratory Visualization & Shiny. Please check the Shiny App here. Background and Motivation
The post
Data Science is a fairly broad term and encompasses a wide range of techniques from data visualization to statistics and machine learning models. But the techniques are only tools...
The R/Finance 2017 conference was just held at the UIC in Chicago, and the event was a huge success. There were a ton of high quality presentations really showcasing...
Living in the Bay Area has led me to think more and more about real estate (and how amazingly expensive it is here…) I’ve signed up for trackers on...
This post will be a modified backtest of the Adaptive Asset Allocation backtest from AllocateSmartly, using the Hierarchical Risk Parity … Continue reading →
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...
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...
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...
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...
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...
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...
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)....
One of the most valuable things I have learned working on Data for Democracy’s Medicare drug spending project has been the value of collaborative tools. It has been my...
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)...
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...
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...
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...
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...
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...
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...
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...
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...
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...
