January 2016

Sentiment Analysis on Donald Trump using R and Tableau

January 2, 2016 | Fisseha Berhane

Recently, the presidential candidate Donal Trump has become controversial. Particularly, associated with his provocative call to temporarily bar Muslims from entering the US, he has faced strong criticism. Some of the many uses of social media analytics is sentiment analysis where we evaluate whether posts on a specific issue are ... [Read more...]

The Power of Decision Stumps

January 1, 2016 | statcompute

A decision stump is the weak classification model with the simple tree structure consisting of one split, which can also be considered a one-level decision tree. Due to its simplicity, the stump often demonstrates a low predictive performance. As shown in the example below, the AUC measure of a stump ... [Read more...]

Eight Advantages of Python Over Matlab

January 1, 2016 | Riddhiman

The original post is here. Dr. Phillip Feldman has kindly agreed to let us repost his thoughts on some key differences between Matlab and Python. 1. readability Python code tends to be more compact and more readable than Matlab code. There are several reasons for this: indentation Unlike Matlab, which uses ... [Read more...]

Some programming language theory in R

January 1, 2016 | John Mount

Let’s take a break from statistics and data science to think a bit about programming language theory, and how the theory relates to the programming language used in the R analysis platform (the language is technically called “S”, but we are going to just call the whole analysis system “... [Read more...]

Simpson’s Paradox

January 1, 2016 | Cory Lesmeister

“Statistics are used much like a drunk uses a lamppost: for support, not illumination.”A.E. Housman (commonly attributed to Andrew Lang)Recently at work I stumbled into a classic example of Simpson's Paradox (Yule-Simpson Effect). Many people are not familiar with this phenomena, so I thought I would provide ... [Read more...]

Google scholar scraping with rvest package

January 1, 2016 | Fisseha Berhane

In this post, I will show how to scrape google scholar. Particularly, we will use the 'rvest' R package to scrape the google scholar account of my PhD advisor. We will see his coauthors, how many times they have been cited and their affiliations. “rvest, inspired by libraries like beautiful ... [Read more...]

Happy New Year! Top posts of 2015

January 1, 2016 | David Smith

Happy New Year everyone! It's hard to believe that this blog has now been going since 2008: our anniversary was on December 9. Thanks to everyone who has supported this blog over the past 7 years by reading, sharing and commenting on our posts, and an extra special thanks to my co-bloggers Joe ... [Read more...]

Extracting raster data using a shapefile

January 1, 2016 | Amy

I recently had an email from a PhD student in Austria who had a raster showing the distribution of Douglas Fir in Europe and wanted to know what proportion of each European country was covered in this species. I have … Continue reading → [Read more...]

Plotting Twitter Data

January 1, 2016 | Abdalla

I’ve only just come to realize some social media sites allow you to download your entire historical activity in one large data file. I don’t know about other sites, but i’m aware that twitter does give you the option to download … Continue reading →
[Read more...]

Plotting Twitter Data

January 1, 2016 | screenshotguy

I’ve only just come to realize some social media sites allow you to download your entire historical activity in one large data file. I don’t know about other sites, but i’m aware that twitter does give you the option to download … Continue reading →
[Read more...]
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