892 search results for "how to import image file to R"

A simple web application using Rook

December 21, 2012
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A simple web application using Rook

by Ben Ogorek I'm grateful to Rook for helping me, a simple statistician, learn a few fundamentals of web technology. For R web application development, there are increasingly polished methods available (most notably Shiny ), but you can build one...

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Working with geographical Data. Part 1: Simple National Infomaps

December 21, 2012
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Working with geographical Data. Part 1: Simple National Infomaps

There is a popular expression in my country called “Gastar polvora en chimangos”, whose translation in English would be “spending gunpowder in chimangos”. Chimango is a kind of bird whose meat is useless for humans. So “spending gunpowder in chimangos” … Continue reading →

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Generation of E-Learning Exams in R for Moodle, OLAT, etc.

December 20, 2012
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Generation of E-Learning Exams in R for Moodle, OLAT, etc.

(Guest post by Achim Zeileis) Development of the R package exams for automatic generation of (statistical) exams in R started in 2006 and version 1 was published in JSS by Gr?n and Zeileis (2009). It was based on standalone Sweave exercises, that can be combined …Read more »

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Generalized Boosted Regression with A Monotonic Marginal Effect for Each Predictor

December 18, 2012
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Generalized Boosted Regression with A Monotonic Marginal Effect for Each Predictor

In the practice of risk modeling, it is sometimes mandatory to maintain a monotonic relationship between the response and each predictor. Below is a demonstration showing how to develop a generalized boosted regression with a monotonic marginal effect for each predictor. Plot of Variable Importance Plot of Monotonic Marginal Effects

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Data Science, Data Analysis, R and Python

The October 2012 issue of Harvard Business Review prominently features the words “Getting Control of Big Data” on the cover, and the magazine includes these three related articles:“Big Data: The Management Revolution,” by Andrew McAfee and Erik Brynjolfsson, pages 61 – 68;“Data Scientist: The Sexiest Job of the 21st Century,” by Thomas H. Davenport and D.J. Patil, pages...

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Mapping GPS Tracks in R

December 13, 2012
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Mapping GPS Tracks in R

This is an explanation of how I used R to combine all my GPS cycling tracks from my Garmin Forerunner 305.Converting to CSVYou can convert pretty much any GPS data to .csv by using GPSBabel. For importing directly from my Garmin, I used the comman...

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Testing Assumption Testing

December 13, 2012
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Testing Assumption Testing

I’ve been doing a lot of linear modeling this year. That’s not much different than any ordinary year, but now I’m doing it in R. I had spent a bit of time in recent years trying to look at loss reserving as a multivariate regression. Excel is happy to do that, but testing various predictor

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Music Network Visualization

December 11, 2012
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Music Network Visualization

Note: probably of interest only to the intersection of the readers who are into niche music genres and those interested in network visualization. My music interests have always been rather, hmm…, eclectic. Somehow IDM, ambient, darkwave, triphop, acid jazz, bossa … Continue reading →

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XLLoop examples

December 10, 2012
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XLLoop examples

Today I want to follow up with the XLLoop framework post. Please read the XLLoop framework post first to setup the XLLoop before trying the examples below. My first example is based on the TFX Package – to retrieve real-time FX quotes. To try this example, please first install the TFX Package. Please note that

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Mapping Primary Care Trust (PCT) Data, Part 1

December 7, 2012
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Mapping Primary Care Trust (PCT) Data, Part 1

The launch or official opening or whatever it was of the Open Data Institute this week provided another chance to grab a snapshot of notable folk in the community, as for example demonstrated by people commonly followed by users of the #ODIlaunch hashtag on Twitter. The PR campaign also resulted in the appearance of some

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