318 search results for "boxplot"

R 2.15.0 is released

March 30, 2012
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R 2.15.0 is released

Bellow is the announcement made by Peter Dalgaard: The build system rolled up R-2.15.0.tar.gz (codename “Easter Beagle”) at 9:00 this morning. This is the first release of the 2.15 series and contains several new features and changes; see the list below for details. You can get the source code from http://cran.r-project.org/src/base/R-2/R-2.15.0.tar.gz or wait for it to be mirrored at...

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How to customize ggplot2 graphics

March 26, 2012
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How to customize ggplot2 graphics

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...

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Nordic Countries Dominate the World in Internet Penetration

March 21, 2012
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Nordic Countries Dominate the World in Internet Penetration

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 -...

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

March 14, 2012
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Visualising F1 Telemetry Data and Plotting Latitude and Longitude with ggplot Map Projections in R

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,

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Simple plots reveal interesting artifacts

March 14, 2012
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Simple plots reveal interesting artifacts

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

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Basic Introduction to ggplot2

March 12, 2012
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Basic Introduction to ggplot2

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...

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R101

March 6, 2012
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R101

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 →

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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)...

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Gastwirth’s location estimator

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...

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ABC in Roma [R lab #2]

March 2, 2012
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ABC in Roma [R lab #2]

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

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