394 search results for "Knitr"

Visiting FHCRC, JHSPH and Meeting Xi’an

October 29, 2012
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Visiting FHCRC, JHSPH and Meeting Xi’an

I have been traveling during the last two weeks. I visited Fred Hutchinson Cancer Research Center on Oct 16 and the Department of Biostatistics at Johns Hopkins at the invitation of Simply Statistics on Oct 23. Today Christian Robert was visiting our department at Iowa State, and I also talked to him. It is really cool...

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Chris Hamm on using plot.new() for better combined plots

October 26, 2012
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Chris Hamm on using plot.new() for better combined plots

At DRUG today, Chris Hamm (email (cahamm at ucdavis dot edu)) showed us an easier way to combine multiple figures into one plot using plot.new, rather than par(mfrow=...) Here’s his script: A Report Generated by knitr# plot.new() [email protected]#I discovered this plotting method when trying to add an inset figure # to a plot# plot.new is part of the traditional graphics....

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9 reasons to use RStudio

October 16, 2012
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9 reasons to use RStudio

In no particular order, here are nine reasons why I really like the RStudio IDE for the R statistical programming language. 1) R benefits from an IDE – I accept that in some languages an IDE is unnecessary—Perl is the first example … Continue reading →

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Getting taxonomic names downstream

October 16, 2012
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It can be a pain in the ass to get taxonomic names. For example, I sometimes need to get all the Class names for a set of species. This is a relatively easy problem using the ITIS API (example below).The much harder problem is getting all the taxono...

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Color Palettes in HCL Space

October 12, 2012
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Color Palettes in HCL Space

This is a quick follow-up to my previous post about Color Palettes in RGB Space. Achim Zeileis had commented that, perhaps, it would be more informative to evaluate the color palettes in HCL (polar LUV) space, as that spectrum more accurately describes how humans perceive color. Perhaps more clear trends would emerge in HCL space,

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Review: Kölner R Meeting 5 October 2012

October 10, 2012
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Review: Kölner R Meeting 5 October 2012

The third Cologne R user meeting took place last Friday, 5 October 2012, at the Institute of Sociology.The evening was sponsored by Revolution Analytics, who provided funding which went towards the Kölner R user group Meetup page. We had a good tur...

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Exploring phylogenetic tree balance metrics

October 10, 2012
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Exploring phylogenetic tree balance metrics

I need to simulate balanced and unbalanced phylogenetic trees for some research I am doing. In order to do this, I do rejection sampling: simulate a tree -> measure tree shape -> reject if not balanced or unbalanced enough. But what is enough? We ne...

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In case you missed it: September 2012 Roundup

October 8, 2012
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In case you missed them, here are some articles from September of particular interest to R users. You can now browse the R-devel sources and changelogs at GitHub. R is used to create a 3-D animation of the Antarctic ice cap. At the DataWeek SF conference, R users from eBay, Intuit, Minted and other companies describe how R is...

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GBIF biodiversity data from R – more functions

October 8, 2012
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GBIF biodiversity data from R – more functions

We have been working on an R package to get GBIF data from R, with the stable version available through CRAN here, and the development version available on GitHub here.We had a Google Summer of code stuent work on the package this summer - you can se...

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Quantifying student feedback using Org mode and R

September 30, 2012
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Quantifying student feedback using Org mode and R

As the term has progressed, my LSM2241 lectures are getting more consistent. I’m aiming to use 45 slides for what is officially a two hour lecture, although in reality it lasts about 90 minutes. We take a break at about 50 … Continue reading →

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