Monthly Archives: April 2011

Video Tutorial on Robust Standard Errors

April 12, 2011
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Video Tutorial on Robust Standard Errors

Update: I have included a modified version of this summaryR() command as part of my package tonymisc, which extends mtable() to report robust standard errors. The tonymisc package is available on CRAN through the install.packages() command.If you have...

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Measuring Price Dispersion of Marijuana

April 12, 2011
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Measuring Price Dispersion of Marijuana

The intersection of mapping APIs, fast database operations and user engagement offers a lot of very cool crowdsourcing applications ranging from the benign and powerful (Google’s Person Finder) to the minor and questionable (A DUI checkpoints app). Most intriguing in … Continue reading →

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Using R + Bioconductor to Get Flanking Sequence Given Genomic Coordinates

April 12, 2011
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Using R + Bioconductor to Get Flanking Sequence Given Genomic Coordinates

I'm working on a project using next-gen sequencing to fine-map a genetic association in a gene region. Now that I've sequenced the region in a small sample, I'm picking SNPs to genotype in a larger sample. When designing the genotyping assay the lab wi...

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Using R + Bioconductor to Get Flanking Sequence Given Genomic Coordinates

April 12, 2011
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I'm working on a project using next-gen sequencing to fine-map a genetic association in a gene region. Now that I've sequenced the region in a small sample, I'm picking SNPs to genotype in a larger sample. When designing the genotyping assay the lab wi...

Read more »

Example 8.34: lack of robustness of t test with small n

April 12, 2011
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Example 8.34: lack of robustness of t test with small n

Tim Hesterberg has effectively argued for a larger role for resampling based inference in introductory statistics courses (and statistical practice more generally). While the Central Limit Theorem is a glorious result, and the Student t-test remarkabl...

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The new R compiler package in R 2.13.0: Some first experiments

April 12, 2011
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R 2.13.0 will be released tomorrow. It contains a new package by R Core member Luke Tierney: compiler. What a simple and straightforward name, and something that Luke has been working on for several years. The NEWS file sayso Package compiler is now provided as a standard package. See ...

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The new R compiler package in R 2.13.0: Some first experiments

April 12, 2011
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R 2.13.0 will be released tomorrow. It contains a new package by R Core member Luke Tierney: compiler. What a simple and straightforward name, and something that Luke has been working on for several years. The NEWS file sayso Package compiler is now provided as a standard package. See ...

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Wilcox’s Robust Statistics: A new R package

April 12, 2011
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Recently I started to build a new package for R containing Wilcox’ collection of functions for robust statistics. Wilcox provides 700+ functions for robust statistics, including: robust correlations (e.g. percentage bend correlation) robust measures of location and mean differences (e.g. … Continue reading →

Box Plot with ggplot2

Hi,in these days I'm creating lots and lots of box plot with ggplot2.The look of them is really good and you can change every bit of code so that you can customize the plot completely.Here is the code I'm using with a test data file to try it:BoxPlot.z...

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Box Plot with ggplot2

April 12, 2011
By
Box Plot with ggplot2

Hi,in these days I'm creating lots and lots of box plot with ggplot2.The look of them is really good and you can change every bit of code so that you can customize the plot completely.Here is the code I'm using with a test data file to try it:BoxPlot.z...

Read more »