# 327 search results for "boxplot"

## How to customize ggplot2 graphics

March 26, 2012
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I consider ggplot2 to be nothing short of a revolution in R graphics. I simply haven't found anything like this package for quickly and elegantly producing usable graphics.  I covered the quick and dirty basics of ggplot2 in a previous post. Now I...

## Nordic Countries Dominate the World in Internet Penetration

March 21, 2012
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Something about that cold weather... The number of internet users in the Nordic countries has greatly outpaced the world by comparison. Denmark, Iceland, Norway, Sweden, Finland - all in the elite echelon. These countries share a common ancestry -...

## Visualising F1 Telemetry Data and Plotting Latitude and Longitude with ggplot Map Projections in R

March 14, 2012
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Why don’t X-Y plots of latitude and longitude data look “right” compared to traditional map views? For example, here’s an X-Y scatterplot of some of Jenson Button’s McLaren telemetry data from the 2010 Australian Formula One Grand Prix: The image was generated, from a data file hosted on Google Spreadsheets, using the following R script,

## Simple plots reveal interesting artifacts

March 14, 2012
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I’ve recently been working with methylation data; specifically, from the Illumina Infinium HumanMethylation450 bead chip. It’s a rather complex array which uses two types of probes to determine the methylation state of DNA at ~ 485 000 sites in the genome. The Bioconductor project has risen to the challenge with a (somewhat bewildering) variety of

## Basic Introduction to ggplot2

March 12, 2012
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This is a very basic introduction to the ggplot2 package.  A much more detailed description of the package can be found in this book ggplot2: Elegant Graphics for Data Analysis. On his website (http://had.co.nz/ggplot2/) package author Hadley Wickham describes ggplot2 asa plotting system for R, based on the grammar of graphics, which tries to take...

## R101

March 6, 2012
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I’m preparing “R101,” an introductory workshop on the statistical software R. Perhaps other beginners might find some use in the following summary and resources. (See also the post on resources for teaching yourself introductory statistics.) Do you have obligatory screenshots … Continue reading →

## ggplot2 0.9.0 released

March 4, 2012
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This announcement was made by Hadley Wickham in the mailing list. ———————- # ggplot2 ggplot2 is a plotting system for R, based on the grammar of graphics, which tries to take the good parts of base and lattice graphics and avoid bad parts. It takes care of many of the fiddly details that make plotting a hassle (like drawing legends)...

## Gastwirth’s location estimator

The problem of outliers – data points that are substantially inconsistent with the majority of the other points in a dataset – arises frequently in the analysis of numerical data.  The practical importance of outliers lies in the fact that even a few of these points can badly distort the results of an otherwise reasonable data analysis.  This outlier-sensitivity...

## ABC in Roma [R lab #2]

March 2, 2012
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Here are the R codes of the second R lab organised by Serena Arima in supplement of my lectures (now completed!). This morning I covered ABC model choice and the following example is the benchmark used in the course (and in the paper) about the impact of summary statistics. (Warning! It takes a while to

This is yet another experiment to see how good is the approximation of binomial probability when we use Poisson and normal distributions for scenarios with large $n$, and $p$ close to zero or one. Consider a problem where the random variable $X$ follows a binomial distribution with a known probability of success $p$, and number of trials $n$. If $n$...