459 search results for "evaluation"

Kaggle: Santa’s Stolen Sleigh

January 22, 2016
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Kaggle: Santa’s Stolen Sleigh

This morning I read Wendy Kan's interesting post on Creating Santa's Stolen Sleigh. I hadn't really thought too much about the process of constructing an optimisation competition, but Wendy gave some interesting insights on the considerations involved in designing a competition which was both fun and challenging but still computationally feasible without military grade hardware. The post

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R trends in 2015 (based on cranlogs)

January 20, 2016
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It is always fun to look back and reflect on the past year. Inspired by Christoph Safferling's post on top packages from published in 2015, I decided to have my own go at the top R trends of 2015. Contrary to Safferling's post I'll try to also (1) look at packages from previous years that hit the big...

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Kaggle: Walmart Trip Type Classification

January 15, 2016
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Kaggle: Walmart Trip Type Classification

Walmart Trip Type Classification was my first real foray into the world of Kaggle and I'm hooked. I previously dabbled in What's Cooking but that was as part of a team and the team didn't work out particularly well. As a learning experience the competition was second to none. My final entry put me at The post

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Presenting Highcharter

January 13, 2016
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Presenting Highcharter

After a lot of documentation, a lot of R CMD checks and a lot of patience from CRAN people I'm happy to anonounce highcharter v0.1.0: A(nother) wrapper for Highcharts charting library. Now it's easy make a chart like this. Do you want to know how? I like Highcharts. It was the first charting javascript library what I used...

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The R Journal, Volume 7/2, December 2015 – is online!

January 11, 2016
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Rlogo

The new issue of The R Journal is now available! You may Download the complete issue, or choose your pleasure from the following links: Table of contents Editorial Bettina Grün4 Contributed Research Articles Fitting Conditional and Simultaneous Autoregressive Spatial Models in hglm Moudud Alam, Lars Rönnegård, Xia Shen5 VSURF: An R Package for Variable Selection Using Random Forests Robin Genuer, Jean-Michel Poggi,...

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Analytic Hierarchy Process (AHP) using preferenceFunction in ahp

January 5, 2016
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Analytic Hierarchy Process (AHP) using preferenceFunction in ahp

Yesterday, I wrote about how to use gluc‘s new ahp package on a simple Tom-Dick-Harry one level decision making problem using Analytic Hierarchy Process (AHP). One of the cool things about that

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Sentiment Analysis on Donald Trump using R and Tableau

January 2, 2016
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Sentiment Analysis on Donald Trump using R and Tableau

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 positive or negative. We can

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Some programming language theory in R

January 1, 2016
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Some programming language theory in R

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 “R”). Our reasoning is: if you … Continue reading...

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Set up Sublime Text for light-weight all-in-one data science IDE

December 23, 2015
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Set up Sublime Text for light-weight all-in-one data science IDE

tl;dr Sublime Text is a powerful text editor. Here I introduce how to add custom REPL config for remote/local R, Python, Scala, Spark, Hive, you name it (this is only tested for OS X). The example below interprets local Python (top), R (middle) and Hive (bottom) code on remote. IDE for everything Good IDEs are everywhere. RStudio for R, Pycharm for...

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Fraud Detection with R and Azure

December 22, 2015
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Fraud Detection with R and Azure

Detecting fraudulent transactions is a key applucation of statistical modeling, especially in an age of online transactions. R of course has many functions and packages suited to this purpose, including binary classification techniques such as logistic regression. If you'd like to implement a fraud-detection application, the Cortana Analytics gallery features an Online Fraud Detection Template. This is a step-by...

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