1969 search results for "ggplot"

Portfolio Trading

November 12, 2012
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Portfolio Trading

In finance and investing the term portfolio refers to the collection of assets one owns. Compared to just holding a single asset at a time a portfolio has a number of potential benefits. A universe of asset holdings within the … Continue reading →

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A thermometer in R using Arduino and Java

November 11, 2012
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A thermometer in R using Arduino and Java

A couple of weeks ago, Markus Gesmann demonstrated the feasability of connecting R and Arduino using Processing and Rserve in a nice and simple example. This actually rekindled my interest in Arduino that I hadn’t had time to satisfy… Again I will show a very easy and simple example, but this time, transferring the data between Arduino and R...

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Revisiting the GOP Race with the Huff Post API and pollstR

November 7, 2012
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Revisiting the GOP Race with the Huff Post API and pollstR

Well, one election is over but it is never too soon to start another – or in this case revisit the past four years One day after the 2008 US Presidential election, there was a Rasmussen poll taken of 1000 likely voters asking for their choice for the 2012 Republican Presedential Candidate. The overwhelming favourite

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In case you missed it: October 2012 Roundup

November 7, 2012
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In case you missed them, here are some articles from October of particular interest to R users. Sponsorships for local R user groups from Revolution Analytics are now open to applicants worldwide. During the landfall of Hurricane Sandy in the US, several R-based apps used public weather and social media data to document its impact, like this timeline of...

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Credit Scoring in R 101

Credit Scoring in R 101

In this post we'll fit some predicitve models in (well know) data bases, and evalute the performance of each model. Disclaimer1: for simplicity the predictive variables are treating without apply any transformation to get a better performance or stabil...

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Quick Post About Getting and Plotting Polls in R

November 5, 2012
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Quick Post About Getting and Plotting Polls in R

With the election nearly upon us, I wanted to share an easy way I just found to download polling data and graph a few with ggplot2. dlinzer at github created a function to download poll data from the Huffington Post's Pollster API.The default is to dow...

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The New Madrid Fault – Past, Present and Future

November 2, 2012
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The New Madrid Fault – Past, Present and Future

New Madrid, Territory of Missouri, March 22, 1816 Dear Sir, In compliance with your request, I will now give you a history, as full in detail as the limits of the letter will permit, of the late awful visitation of Providence in this place and vicinity.  On the 16th of December, 1811, about two o'clock, A.M., we were visited by a violent...

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GGtutorial: Day 5 – Gradient Colors and Brewer Palettes

November 2, 2012
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GGtutorial: Day 5 – Gradient Colors and Brewer Palettes

So, continuing with the short tutorials on how to do relatively simple (but sometimes very frustrating things) in ggplot, today’s post looks at how to use gradient colors and Brewer colors to color either continuous or discrete dependent variab...

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Upcoming R training by Hadley Wickham: SF Dec 3-4, DC Dec 10-11

November 1, 2012
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(By Hadley Wickham) Hi all, I’d like to let you know about four R training courses that RStudio will be offering in December: * Effective data visualization (http://bit.ly/TY2ONI) Dec 3. San Francisco, CA * Reports and reproducible research (http://bit.ly/RsZmYr) Dec 4. San Francisco, CA * Advanced R programming (http://bit.ly/RvZDsd) Dec 10. Washington, DC * Package development (http://bit.ly/UhTIWz) Dec 11....

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GGtutorial: Day 4 – More Colors

November 1, 2012
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GGtutorial: Day 4 – More Colors

So far we’ve covered Melting and Casting data using the reshape() package and today we’re going to look at different ways of coloring and selecting palettes for plots. For these plots, we’re going to use the built in diamonds data...

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