Blog Archives

Craig Venter’s first chromosome

December 19, 2015
By

is, I think, the one you can find at sacred-texts.org. curl -O 'http://www.sacred-texts.com/dna/hgp011k.htm' #get it #BORING DATA JANITORSHIP tail -n +15 hgp011k.htm > hgp011k #remove the HTML head stuff .. up to <pre> head -n -3 hgp011k | sponge hgp011k #remove the HTML tail #the `sponge` nonsense is because `command < file > file` will just blank your file #`sponge` holds the...

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Clay tablet YBC 7289 with an overlay to emphasize the…

September 5, 2015
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Clay tablet YBC 7289 with an overlay to emphasize the…

Clay tablet YBC 7289 with an overlay to emphasize the markings on its surface. The cuneiform inscriptions demonstrate the derivation of the square root of 2 … in sexagesimal (base-60) via Paul Murrell the tablet has been dated to sometime between 1800 BC and 1600 BC....

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Catalan numbers for triangulations gambler’s ruin binary…

July 27, 2015
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Catalan numbers for
triangulations
gambler’s ruin
binary…

Catalan numbers for triangulations gambler’s ruin binary trees trees …from the Flajolet/Sedgewick coursera analysis of algorithms in R: catalan % unlist %>% sum } (This is slow above catalan(10) though, so

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Hacks for thinking about high-dimensional space

June 2, 2015
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Hacks for thinking about high-dimensional space

High-dimensional Euclidean space is ℝ×ℝ×ℝ×ℝ×ℝ×…. Cartesian product of many continuous quantities. You are already familiar with the concept via “an arbitrary...

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Treasury yield curve from the Volcker era through Greenspan,…

November 5, 2014
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Treasury yield curve from the Volcker era through Greenspan,…

2006–2014 using FRBData 2006–2014 using FRBData packageTreasury yield curve from the Volcker era through Greenspan, Bernanke, and Yellen. require(YieldCurve) data(FedYieldCurve) maturities I can’t upload a larger view, but just run that code with a bigger width & height, you might get a ~10MB gif. I shrank it further with gifsicle. Here’s the animated history of the ECB yield curve,...

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List of R programmers

September 26, 2014
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List of R programmers: Hello R people. In December of 2013 I posted a cheap-o wiki-editable (thank you github) contact list which recruiters can use to find you, if they’re looking for R programmers. In what I consider a resounding success, within a few weeks it got onto the first page of google (thank you github), and...

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√(x²−1)(x²−k²).      x,k∈ℂ (actually just going over the unit…

September 15, 2014
By
√(x²−1)(x²−k²).      x,k∈ℂ
(actually just going over the unit…

√(x²−1)(x²−k²), k∈ℂ x²√(x²−1)(x²−k²).      x,k∈ℂ (actually just going over the unit circle, not all of ℂ) edit: hey, are these showing up as moving gif’s for you? code: require(animation) source(wegert.R) #where I define "plat" and "Z", standard for...

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Measuring Fat Loss without the scale

July 30, 2014
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Measuring Fat Loss without the scale

@tdhopper posted his self-measurements of weight loss a few months back. I recently decided also that I wanted to lose fat-weight—the infamous “I could stand to be a few kilos lighter”—and I think I came up with a more productive way of thinking about my progress: I’m not going to look at the scale at all....

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> plot( polyroot(choose(131,14:29)) ,pch=19,col=’red’) >…

July 23, 2014
By
> plot( polyroot(choose(131,14:29)) ,pch=19,col=’red’)
>…

29 39 59 79 99 119 "139"> plot( polyroot(choose(131,14:29)) ,pch=19,col='red') > plot( polyroot(choose(131,14:39)) ,pch=19,col='red') > plot( polyroot(choose(131,14:59)) ,pch=19,col='red') > plot( polyroot(choose(131,14:79)) ,pch=19,col='red') > plot( polyroot(choose(131,14:99)) ,pch=19,col='red') > plot( polyroot(choose(131,14:119)) ,pch=19,col='red') > plot( polyroot(choose(131,14:139)) ,pch=19,col='red')

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Size of each object in R’s workspace

July 22, 2014
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Size of each object in R’s workspace

I’ve googled How do I find out how big my workspace is too many times … here’s the explicit code to run and hopefully the next googler sees this post: for (thing in ls()) { message(thing); print(object.size(get(thing)), units='auto') } Fin. You can stop there.   Or for a bit of context… Here’s an example code to generate objects of variable sizes where you...

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