376 search results for "animation"

Princes Disguised in Uniforms

June 18, 2016
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Princes Disguised in Uniforms

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a GNU General Public License (GPL v3) license from . Abstract We revisit the secretary problem as a mathematical fairy tale: Princes wooing a princess sequentially...

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Optimal Choice – Mathematical Advice for Real Life

June 11, 2016
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Optimal Choice – Mathematical Advice for Real Life

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a GNU General Public License (GPL v3) license from . Abstract We discuss how to choose the optimal candidate from a rankable sequence of candidates arriving...

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idbr: access the US Census Bureau International Data Base in R

June 6, 2016
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idbr: access the US Census Bureau International Data Base in R

Today’s post is by Kyle Walker, a professor of geography at Texas Christian University. I’ve been a fan of Kyle’s work for a while. When I saw that he wrote a package for accessing the Census Bureau’s International Data Base, I asked him to write a guest post about it. The US Census Bureau’s International The post

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Visualizing a flood with R

June 3, 2016
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Visualizing a flood with R

As more settlements in Texas and France are impacted by severe flooding, this is a good time to thank the hydrologists at the NOAA who forecast river level rises in advance and give residents in affected areas time to move to higher ground. Along with topgraphic, rainfall, and weather data, monitoring stations maintained by NOAA and the USGS along...

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Visual contrast of two robust regression methods

Visual contrast of two robust regression methods

Robust regression For training purposes, I was looking for a way to illustrate some of the different properties of two different robust estimation methods for linear regression models. The two methods I’m looking at are: least trimmed squares, implemented as the default option in lqs() a Huber M-estimator, implemented as the default option in rlm() Both functions...

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Animated great circles on rotating 3D Earth: Example R code

May 16, 2016
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Making still frames for great circle animations in R Matthew Leonawicz Here I share R code I used to produce animated great circle arcs on top of a rotating 3D Earth. The code is not entirely reproducible but you should be able to use what is shared here to create your own video frames given

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Global Temperature Change in R & D3 (without the vertigo)

May 14, 2016
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Global Temperature Change in R & D3 (without the vertigo)

This made the rounds on social media last week: Spiraling global temperatures from 1850-2016 (full animation) https://t.co/YETC5HkmTr pic.twitter.com/Ypci717AHq— Ed Hawkins (@ed_hawkins) May 9, 2016 One of the original versions was static and was not nearly as popular, but—as you can see—this one went viral. Despite the public’s infatuation with circles (I’m lookin’ at you, pie... Continue reading →

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When Should One Stop Testing Software?

When Should One Stop Testing Software?

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a GNU General Public License (GPL v3) license from . Abstract This is a small note rediscovering a gem published by S. R. Dalal and C....

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Zooming

May 2, 2016
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Zooming

You don’t have to be beautiful to turn me on (Kiss, Prince) I discovered recently how easy is to create GIFs with R using ImageMagick and I feel like a kid with a new toy. To begin this new era of my life as R programmer I have done this: First of all, read this … Continue reading...

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Principal curves example (Elements of Statistical Learning)

April 21, 2016
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Principal curves example (Elements of Statistical Learning)

The bit of R code below illustrates the principal curves methods as described in The Elements of Statistical Learning, by Hastie, Tibshirani, and Friedman (Ch. 14; the book is freely available from the authors' website). Specifically, the code generates some bivariate data that have a nonlinear association, initializes the principal curve using the first (linear) principal … Continue reading...

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