385 search results for "animation"

Simulating backgammon players’ Elo ratings

August 6, 2015
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Simulating backgammon players’ Elo ratings

Probabilities of winning with a given rating Backgammon clubs and on-line forums use a modified form of the Elo rating system to keep track of how well individuals have played and draw inferences about their underlying strength. The higher the rating, the stronger the player. Players with higher ratings are inferred to be stronger than those with...

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Visualizing population density

August 3, 2015
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Visualizing population density

MANHATTAN IS MORE EXTREME THAN YOU THINK IN POPULATION DENSITY Slinging numbers around all day, one adage we believe is that most surprising statistics are wrong. But here’s one that’s not: When you look at the 100 most populous counties in the USA, Manhattan (aka New York County) has about twice the population density of The post

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Rendering LaTeX Math Equations in GitHub Markdown

July 31, 2015
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Rendering LaTeX Math Equations in GitHub Markdown

The Problem: GitHub README.md won't render LaTeX I have many times wondered about getting LaTeX math to render in a README file on GitHub. Apparently, many others ( 1, 2, 3 ), have asked the same question. The common answers are: It cannot (and in some cases, shouldn't) be done. GitHub parsing is done by

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Rendering LaTeX Math Equations in GitHub Markdown

July 31, 2015
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Rendering LaTeX Math Equations in GitHub Markdown

The Problem: GitHub README.md won't render LaTeX I have many times wondered about getting LaTeX math to render in a README file on GitHub. Apparently, many others ( 1, 2, 3 ), have asked the same question. The common answers are: It cannot (and in some cases, shouldn't) be done. GitHub parsing is done by

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Doodling With 3d Animated Charts in R

July 22, 2015
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Doodling With 3d Animated Charts in R

Doodling with some Gapminder data on child mortality and GDP per capita in PPP$, I wondered whether a 3d plot of the data over the time would show different trajectories over time for different countries, perhaps showing different development pathways over time. Here are a couple of quick sketches, generated using R (this is the

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“Just the text ma’am” – Web Site Content Extraction with XSLT & R

July 9, 2015
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Sometimes you just need the salient text from a web site, often as a first step towards natural language processing (NLP) or classification. There are many ways to achieve this, but XSLT (eXtensible Stylesheet Language) was purpose-built for slicing, dicing and transforming XML (and, hence, HTML) so, it can make more sense and even be speedier use XSLT...

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flip and rotate branches in ggtree

June 30, 2015
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flip and rotate branches in ggtree

flip function is a feature request from ggtree user. It accepts a tree view and two node numbers and exchange the positions of the selected clades. ?View Code RSPLUS1 Read More: 159 Words Totally

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flip and rotate branches in ggtree

June 30, 2015
By
flip and rotate branches in ggtree

flip function is a feature request from ggtree user. It accepts a tree view and two node numbers and exchange the positions of the selected clades. require(ggtree) set.seed(2015-07-01) tr <- rtree(30) p <- ggtree(tr) + geom_text(aes(label=node)) gridExtra::grid.arrange(p, flip(p, 38, 33), ncol=2) It’s chainable and all possible position adjustment can be achieved via multiple flip operations. flip(p, 38, 33) %>% flip(53, 58) %>% flip(32, 51) It’s tedious...

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15 Easy Solutions To Your Data Frame Problems In R

June 11, 2015
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15 Easy Solutions To Your Data Frame Problems In R

R’s data frames regularly create somewhat of a furor on public forums like Stack Overflow and Reddit. Starting R users often experience problems with the data frame in R and it doesn’t always seem to be straightforward. But does it really need to be so? Well, not necessarily. With today’s post, DataCamp wants to show The post

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Mortgages Are About Math: Open-Source Loan-Level Analysis of Fannie and Freddie

June 9, 2015
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Mortgages Are About Math: Open-Source Loan-Level Analysis of Fannie and Freddie

ortgages were acknowledged to be the most mathematically complex securities in the marketplace. The complexity arose entirely out of the option the homeowner has to prepay his loan; it was poetic that the single financial complexity contributed to the marketplace by the common man was the Gordian knot giving the best brains on Wall Street a run...

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