2339 search results for "ggplot"

The R journal – Volume 5/1, June 2013

July 3, 2013
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r_project

The new R Journal is out! Click for a complete table of content with links to all papers.

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Which airline should you be loyal to?

July 2, 2013
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Which airline should you be loyal to?

LOYALTY PROGRAM CHOICE BASED ON DEPARTURE COUNT If you read Decision Science News, you’re probably a professor or grad student or researcher or policy type who flies around a lot to conferences, symposia, workshops, tutorials, summer schools, and all-hands meetings. You travel the globe to give talks and work with co-authors. All this flying around The post Which...

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A Brief Look at Mixture Discriminant Analysis

July 2, 2013
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A Brief Look at Mixture Discriminant Analysis

Lately, I have been working with finite mixture models for my postdoctoral work on data-driven automated gating. Given that I had barely scratched the surface with mixture models in the classroom, I am becoming increasingly comfortable with them. With this in mind, I wanted to explore their application to classification because there are times when a single class is clearly made up of...

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Using R to Produce Scalable Vector Graphics for the Web

June 30, 2013
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Using R to Produce Scalable Vector Graphics for the Web

Statistical software is normally used during the analysis stage of a project and a cleaned up static graphic is created for the presentation.  If the presentation is in web format then there are some considerations that are needed. The trick is to find ways to implement those graphs in that web format so the graph

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Learning R: Parameter Fitting for Models Involving Differential Equations

June 30, 2013
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Learning R: Parameter Fitting for Models Involving Differential Equations

It looks like MATLAB, Octave and Python seem to be the preferred tools for scientific and engineering analysis (especially those involving physical models with differential equations). However as part of my learning R experience, I wanted to check out some … Continue reading →

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Shiny Server on CentOS

June 29, 2013
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I’ve been enjoying working with Joe Cheng’s Shiny Server and wanted to create a quick step-by-step guide on installing it on an AWS CentOS EC2 instance as the standard Shiny Server instructions assume the typical dependencies are installed: 1. Shiny’s instructions say to install libssl-dev (sudo yum install libssl-dev), here is the CentOS equivalent : sudo yum install openssl-devel

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Using R: Two plots of principal component analysis

June 26, 2013
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Using R: Two plots of principal component analysis

PCA is a very common method for exploration and reduction of high-dimensional data. It works by making linear combinations of the variables that are orthogonal, and is thus a way to change basis to better see patterns in data. You either do spectral decomposition of the correlation matrix or singular value decomposition of the data

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-omics in 2013

June 24, 2013
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-omics in 2013

Just how many (bad) -omics are there anyway? Let’s find out. 1. Get the raw data It would be nice if we could search PubMed for titles containing all -omics: However, we cannot since leading wildcards don’t work in PubMed search. So let’s just grab all articles from 2013: and save them in a format

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Visualising Crime Hotspots in England and Wales using {ggmap}

June 24, 2013
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Visualising Crime Hotspots in England and Wales using {ggmap}

Two weeks ago, I was looking for ways to make pretty maps for my own research project. A quick search led me to some very informative blog posts by Kim Gilbert, David Smith and Max Marchi. Eventually, I Google'd the excellent crime weather map exa...

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Opel Corsa Diesel Usage

June 24, 2013
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Opel Corsa Diesel Usage

I wanted to extend my car weight distribution calculation of June 16 from only 2000 to years 2000 to 2013. Unfortunately, come Sunday afternoon the code seemed too slow and not even the beginning of a post. So, I went on to another calculation I w...

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