1866 search results for "RStudio"

Sustainable code for social scientists

Over at his blog “One Tip per Day”, Xianjun Dong has produced an excellent list of “15 Practical Tips For a Bioinformatician”. This note is my own version of these tips, aimed at social scientists who need to write sustainable (i.e. reproducible) code for either individual or collective research projects. Required software This note is based on my...

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Interactively building test forms from an IRT perspective An application of R and Shiny

February 18, 2016
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Interactively building test forms from an IRT perspective An application of R and Shiny

Interactively building test forms from an IRT perspective: An application of R and Shiny Brandon LeBeau University of Iowa Overview R R is an open source statistical programming language. Pros: Common statistical procedures...

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Interactively building test forms from an IRT perspective An application of R and Shiny

February 18, 2016
By
Interactively building test forms from an IRT perspective An application of R and Shiny

Interactively building test forms from an IRT perspective: An application of R and Shiny Brandon LeBeau University of Iowa Overview R R is an open source statistical programming language. Pros: Common statistical procedures...

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Shiny on Webfaction: VPS installing without root

February 15, 2016
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I've been using Webfaction as an inexpensive managed VPN. Part of me wants VPS root access, but I'm mostly happy to leave the administrative details to others. Webfaction seems to be a good example of a common VPS plan: user-only access in a rich development environment. Compilers, zsh, and even tmux are available from the shell, making...

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New R logo

February 12, 2016
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New R logo

The R logo has been revised in to be more compatible with the principles of flat design followed by some recent user interfaces such as Microsoft Windows >= 8 and Mac OS X >= 10.10 (Yosemite). The new logo is available for download from the R project web site in SVG and high-resolution PNG formats: https://www.r-project.org/logo Thanks to Hadley...

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Why I use ggplot2

February 12, 2016
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Why I use ggplot2

If you’ve read my blog, taken one of my classes, or sat next to me on an airplane, you probably know I’m a big fan of Hadley Wickham’s ggplot2 package, especially compared to base R plotting. Not everyone agrees. Among the anti-ggplot2 crowd is JHU Professor Jeff Leek, who yesterday wrote up his thoughts on the Simply Statistics...

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Getting Started with Microsoft SQL Server on Azure

February 11, 2016
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Getting Started with Microsoft SQL Server on Azure

by Joseph Rickert If you are an R user and work for an enterprise where Microsoft SQL server is important, it is extremely helpful to have easy access to SQL Server databases. Over the past year, we have run several posts on this topic including a comprehensive four part series from Microsoft's Gregory Vandenbrouck on using various flavors of...

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Reverse Engineering with Correlated Features

February 11, 2016
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Reverse Engineering with Correlated Features

In econometric modeling, I usually have a problem with correlated features. A few weeks ago, I was discussing feature selection when features are correlated. This week, I was wondering about reverse engineering when features might be correlated (not to say very correlated). The way I see reverse engineering is the following someone has some dataset, and based on that dataset, a...

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Clustering French Cities (based on Temperatures)

February 11, 2016
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Clustering French Cities (based on Temperatures)

In order to illustrate hierarchical clustering techniques and k-means, I did borrow François Husson‘s dataset, with monthly average temperature in several French cities. > temp=read.table( + "http://freakonometrics.free.fr/FR_temp.txt", + header=TRUE,dec=",") We have 15 cities, with monthly observations > X=temp > boxplot(X) Since the variance seems to be rather stable, we will not ‘normalize’ the variables here, > apply(X,2,sd) Janv Fevr Mars...

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Plot the new SVG R logo with ggplot2

February 11, 2016
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Plot the new SVG R logo with ggplot2

High resolution and SVG versions of the new R logo are finally available. I converted the SVG to WKT (file here) which means we can use it like we would a shapefile in R. That includes plotting! Here’s a short example of how to read that WKT and plot the logo using ggplot2: library(sp) library(maptools)

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