4805 search results for "git"

Zombie Apocalypse Survival Test – R-Powered (using Concerto)

June 17, 2013
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Zombie Apocalypse Survival Test – R-Powered (using Concerto)

This test is the first attempt to seriously assess the ability of individuals to survive a zombie apocalypse.  This test is administered using the R powered open-source testing platform Concerto developed at the University of Cambridge. The t...

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Dave Harris on Maximum Likelihood Estimation

June 17, 2013
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Dave Harris on Maximum Likelihood Estimation

At our last Davis R Users’ Group meeting of the quarter, Dave Harris gave a talk on how to use the bbmle package to fit mechanistic models to ecological data. Here’s his script, which I ran throgh the spin function in knitr: # Load data library(emdbook) ## Loading required package: MASS Loading required package: lattice library(bbmle) ## Loading required package:...

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Stashing and playing with raw data locally from the web

June 17, 2013
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It is getting easier to get data directly into R from the web. Often R packages that retrieve data from the web return useful R data structures to users like a data.frame. This is a good thing of course to make things user friendly. However, what if you want to drill down into the data that's returned from a query...

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Stashing and playing with raw data locally from the web

June 17, 2013
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It is getting easier to get data directly into R from the web. Often R packages that retrieve data from the web return useful R data structures to users like a data.frame. This is a good thing of course to make things user friendly. However, what if you want to drill down into the data that's returned from a query...

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analyze the pesquisa de orcamentos familiares (pof) with r

June 17, 2013
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for the unlucky among us born without a portuguese mother tongue, the pesquisa de orcamentos familiares (pof) translates to survey of household budgets.  this data set captures brazilian family consumption habits, allocation of expenses, and incom...

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Annotating select points on an X-Y plot using ggplot2

June 16, 2013
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Annotating select points on an X-Y plot using ggplot2

or, Is the Seattle Mariners outfield a disaster?The BackstoryEarlier this week (2013-06-10), a blog post by Dave Cameron appeared at USS Mariner under the title “Maybe It's Time For Dustin Ackley To Play Some Outfield”. In the first paragraph, Cameron describes to the Seattle Mariners outfield this season as “a complete disaster” and Raul Ibanez as...

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Dynamic Data Visualizations in the Browser Using Shiny

June 16, 2013
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Dynamic Data Visualizations in the Browser Using Shiny

After being busy the last two weeks teaching and attending academic conferences, I finally found some time to do what I love, program data visualizations using R. After being interested in Shiny for a while, I finally decided to pull the trigger and build my first Shiny app! I wanted to make a proof of

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Scenario analysis and trading options using R

June 16, 2013
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Scenario analysis and trading options using R

I present you with my restructured project on options trading and scenario analysis. You are more than welcome to try it out. Firstly, I will give a small presentation that will reveal what you can do with it and whether you need to continue reading. T...

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The scaling of Expected Shortfall

June 16, 2013
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The scaling of Expected Shortfall

Getting Expected Shortfall given the standard deviation or Value at Risk. Previously There have been a few posts about Value at Risk and Expected Shortfall. Properties of the stable distribution were discussed. Scaling One way of thinking of Expected Shortfall is that it is just some number times the standard deviation, or some other number … Continue reading...

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Distribution of car weights

June 16, 2013
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Distribution of car weights

Two weeks ago I described car data, among which weight distribution of cars in Netherlands. At that time it was purely plots. In the mean time I decided I wanted to model trends. As a first step of that, I decided to fit distributions for these da...

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