When Size Matters: Weighted Effect Coding

February 24, 2017
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Categorical variables in regression models are often included by dummy variables. In R, this is done with factor variables with treatment coding. Typically, the difference and significance of each category are tested against a preselected ...

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a riddle at the end of its tether

February 23, 2017
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a riddle at the end of its tether

A simply worded riddle this week on The Riddler, about four ropes having non-uniform and unknown burning rates, the only constraint being they all burn completely in one hour....

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Factor Analysis with the Principal Factor Method and R

February 23, 2017
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As discussed in a previous post on the principal component method of factor analysis, the term in the estimated covariance matrix , , was excluded and we proceeded directly...

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Preview: R Tools for Visual Studio 1.0

February 23, 2017
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Preview: R Tools for Visual Studio 1.0

After more than a year in preview R Tools for Visual Studio, the open-source extension to the Visual Studio IDE for R programming, is nearing its official release. RTVS...

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On Watering Holes, Trust, Defensible Systems and Data Science Community Security

February 23, 2017
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On Watering Holes, Trust, Defensible Systems and Data Science Community Security

I’ve been threatening to do a series on “data science community security” for a while and had cause to issue this inaugural post today. It all started with this:...

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Gartner’s 2017 Take on Data Science Software

February 23, 2017
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Gartner’s 2017 Take on Data Science Software

In my ongoing quest to track The Popularity of Data Analysis Software, I’ve finally decided to change the title to use the newer term “data science”. The 2017 version...

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Reporting in a Repeatable, Parameterised, Transparent Way

February 23, 2017
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Reporting in a Repeatable, Parameterised, Transparent Way

Earlier this week, I spent a day chatting to folk from the House of Commons Library as a part of a bit of temporary day-a-week-or-so bit of work I’m...

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Mapping Biodiversity data on smaller than one degree scale

February 22, 2017
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Mapping Biodiversity data on smaller than one degree scale

Guest Post by Enjie (Jane) LI I have been using bdvis package (version 0.2.9) to visualize the iNaturalist records of RAScals project (http://www.inaturalist.org/projects/rascals). Initially, the mapgrid function in the bdvis...

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Announcing ggraph: A grammar of graphics for relational data

February 22, 2017
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Announcing ggraph: A grammar of graphics for relational data

I am absolutely thrilled to announce that ggraph has finally been released on CRAN. ggraph is my most ambitious package to date and its very early genesis has been described...

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Euler Problem 13: Large Sum of 1000 Digits

February 22, 2017
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Euler Problem 13: Large Sum of 1000 Digits

Euler Problem 13 asks to add one hundred numbers with fifty digits. This seems like a simple problem where it not that most computers are not designed to deal with...

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The difference between R and Excel

February 22, 2017
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The difference between R and Excel

If you're an Excel user (or any other spreadsheet, really), adapting to learn R can be hard. As this blog post by Gordon Shotwell explains, one of the reasons...

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#AskNASA: What’s the Optimal Time for Aliens to Invade Earth?

February 22, 2017
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#AskNASA: What’s the Optimal Time for Aliens to Invade Earth?

This post was originally published on SmartCat, 22 Feb 2017.My inaugural blog as a Data Science Consultant for SmartCat. The code that accompanies the analyses presented here...

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Finding Radiohead’s most depressing song, with R

February 22, 2017
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Finding Radiohead’s most depressing song, with R

Radiohead is known for having some fairly maudlin songs, but of all of their tracks, which is the most depressing? Data scientist and R enthusiast Charlie Thompson ranked all...

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How to Teach R: Common mistakes

February 22, 2017
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by Garrett Grolemund Would you like to teach people to use R? If so, I would like to jump-start your efforts. I’m one half of RStudio’s education team, and...

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Quick tip: knitr Python Windows setup checklist

February 22, 2017
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Quick tip: knitr Python Windows setup checklist

One of the nifty things about using R is that you can use it for many different purposes and even other languages! If you want to use Python in...

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leaflet 1.1.0

February 22, 2017
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leaflet 1.1.0

Leaflet 1.1.0 is now available on CRAN! The Leaflet package is a tidy wrapper for the Leaflet.js mapping library, and makes it incredibly easy to generate interactive maps based on...

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Data Transformation in R: The #Tidyverse-Approach of Organizing Data #rstats

February 22, 2017
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Data Transformation in R: The #Tidyverse-Approach of Organizing Data #rstats

Yesterday, I had the pleasure to give a talk at the 8th Hamburg R User-Group meeting. I talked about data wrangling and data transformation, and how the…

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Part 3: Spatial analysis of geotagged data

February 21, 2017
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Part 3: Spatial analysis of geotagged data

Part 3: Spatial analysis of geotagged data See the other parts in this series of blog posts. In parts 1 and 2 we extracted spatial coordinates from our photos and then made an...

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Raccoon | Ch 2.5 – Unbalanced and Nested Anova

February 21, 2017
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Raccoon | Ch 2.5 – Unbalanced and Nested Anova

Raccoon is a free web-book about Statistical Models with R. This chapter tackles two Anova special cases: Unbalanced Anova and Nested Anova . The post Raccoon |...

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The Zero Bug

February 21, 2017
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The Zero Bug

I am going to write about an insidious statistical, data analysis, and presentation fallacy I call “the zero bug” and the habits you need to cultivate to avoid it....

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Free DataCamp for your Classroom

February 21, 2017
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Free DataCamp for your Classroom

Announcing: DataCamp for the classroom, a new free plan for Academics. We want to support every student that wants to learn Data Science. That is why, as of today, professors/teachers/TA’s/…...

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Linear Regression and ANOVA shaken and stirred

February 21, 2017
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Linear Regression and ANOVA concepts are understood as separate concepts most of the times. The truth is they are extremely related to each other being ANOVA a particular case...

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Text Mining on Wine Description

February 21, 2017
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Text Mining on Wine Description

Here is an example of text mining with correspondence analysis. Within the context of research into the characteristics of the wines from Chenin vines in the Loire Valley (French...

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Three R Shiny tricks to make your Shiny app shines (2/3): Semi-collapsible sidebar

February 21, 2017
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Three R Shiny tricks to make your Shiny app shines (2/3): Semi-collapsible sidebar

EDIT: Actually there is a much easier way to do so, by just adding the code below to the UI: tags$script(HTML(“$(‘body’).addClass(‘sidebar-mini’);”)) Thanks at @_pvictorr for suggesting it! Original post:...

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Coming soon!

February 21, 2017
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Coming soon!

We've just received a picture of the cover of the BCEA book, which is really, really close to being finally published!I did...

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How to make a global map in R, step by step

February 21, 2017
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How to make a global map in R, step by step

In this post, I want to walk you through the logic of building a map, step by step ... The post How to make a global map in...

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Use switch() instead of ifelse() to return a NULL

February 21, 2017
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Use switch() instead of ifelse() to return a NULL

Have you ever tried to return a NULL with the ifelse() function? This function is a simple vectorized workflow for conditional statements. However, one can’t just return a...

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Who is Alan Turing?

February 21, 2017
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Who is Alan Turing?

This government is committed to introducing posthumous pardons for people with certain historical sexual offence convictions who would be innocent of any crime now (British Government Spokesperson, September 2016)...

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Sentiment Analysis in R

February 21, 2017
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Current research in finance and the social sciences utilizes sentiment analysis to understand human decisions in response to textual materials. While sentiment analysis has received great traction lately, the...

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