1821 search results for "tutorial"

Eight Christmas Gift Ideas for the Statistically Interested

December 1, 2014
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Eight Christmas Gift Ideas for the Statistically Interested

Christmas is soon upon us and here are some gift ideas for your statistically inclined friends (or perhaps for you to put on your own wish list). If you have other suggestions please leave a comment! :) 1. Games of probability A recently released game where probability takes the main role is Pairs, an easy going press-your-luck game that can...

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Some R Highlights from H20 World

November 28, 2014
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Some R Highlights from H20 World

by Joseph Rickert H2O.ai held its first H2O World conference over two days at the Computer History Museum in Mountain View, CA. Although the main purpose of the conference was to promote the company's rich set of Java based machne learning algorithms and announce their new products Flow and Play there were quite a few sessions devoted to R...

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R, an Integrated Statistical Programming Environment and GIS

November 27, 2014
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R, an Integrated Statistical Programming Environment and GIS

This article was originally published in Geoinformatics magazine. R is well known as a powerful, extensible and relatively fast statistical programming language and open software project with a command line interface (CLI). What is less well known is that R also has cutting edge spatial packages that allow it to behave as a fully featured Geographical Information System...

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Tips and Tricks for Getting Started with R

November 26, 2014
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All statistical software have a learning curve, and compared to SPSS, R has taken me more time to learn the basics. However, since learning the basics, R seems easier to use than SPSS. Here are 10 tips and tricks (and some resources) I found helpful for getting started with R: Use RStudio, a separate interface that is installed along with R that makes it...

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Performing Logistic Regression in R and SAS

Performing Logistic Regression in R and SAS

Introduction My statistics education focused a lot on normal linear least-squares regression, and I was even told by a professor in an introductory statistics class that 95% of statistical consulting can be done with knowledge learned up to and including a course in linear regression.  Unfortunately, that advice has turned out to vastly underestimate the

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An xpd-tion into R plot margins

November 20, 2014
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An xpd-tion into R plot margins

This is a guest post by Prasad Patil that answers the question: how to put a shape in the margin of an R plot? The help page for R's par() function is a somewhat impenetrable list of abbreviations that allow you to manipulate anything and everything in the plotting device. You may have used this function in the past to create an...

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RNA-seq Data Analysis Course Materials

November 20, 2014
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Last week I ran a one-day workshop on RNA-seq data analysis in the UVA Health Sciences Library. I set up an AWS public EC2 image with all the necessary software installed. Participants logged into AWS, launched the image, and we kicked off the morning ...

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Count Your BLAS-ings

November 19, 2014
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Count Your BLAS-ings

One nice thing about open-source software is that users often have a lot of choices.  Such is the case with R, for instance the thousands of contributed packages available on CRAN.  My focus here is on BLAS, the core of matrix operations in R, where again there are interesting choices available to users who wish

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A look at the igraph package

November 13, 2014
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A look at the igraph package

by Joseph Rickert The igraph package has become a fundamental tool for the study of graphs and their properties, the manipulation and visualization of graphs and the statistical analysis of networks. To get an idea of just how firmly igraph has become embedded into the R package ecosystem consider that currently igraph lists 72 reverse depends, 59 reverse imports...

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analyze the national incident-based reporting system (nibrs) with r and monetdb

November 11, 2014
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in 2012, more than one quarter of the united states population lived in the jurisdiction of a police department that submitted details about every crime to a central repository maintained by the fbi.  a production of the uniform crime reports (ucr) program, the national incident-based reporting system (nibrs) compiles statistics from police agencies in thirty five states...

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