2763 search results for "GIS"

Revolution Newsletter: April 2012

April 20, 2012
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The most recent edition of the Revolution Newsletter is out. The news section is below, and you can read the full April edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via email. Spring Webinar Series. Our Spring Webinar Series features presentations from Revolution Analytics staff and...

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Getting Historical Weather Data in R and SAP HANA

April 19, 2012
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For many of my latest data blogs, I needed historical weather data to perform data mash-ups to pin-point the cause.  For example, for my continued exploration into the airlines/airports historical data using SAP HANA and R, I wanted to find out wh...

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An R Script to Automatically download PubMed Citation Counts By Year of Publication

April 19, 2012
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An R Script to Automatically download PubMed Citation Counts By Year of Publication

Ever wanted to look at PubMed trends and make elegant graphs of them? Here’s an R script that will do it automatically for you.

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Tutorial: Using plot() function

April 19, 2012
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Tutorial: Using plot() function

Hello Readers! This is my first post as a member ofR-bloggers. In this post I'm going to talk about the basic plotting in R, fortwo dimensional. This is a tutorial for beginners in R.To begin with, let's define a vector first. Say wehave vector x, whic...

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Efficient Frontier of Funds and Allocation Systems

April 18, 2012
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Efficient Frontier of Funds and Allocation Systems

I did a very basic experiment in Efficient Frontier of Buy-Hold and Tactical System where I determined the efficient frontier of the S&P 500 with itself transformed by a Mebane Faber 10-month moving average tactical allocation. The result was inter...

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knitr Performance Report-Attempt 2

April 18, 2012
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knitr Performance Report-Attempt 2

Over the years I have changed my learning process from reading thoroughly first before proceeding to reading minimally and then applying immediately.  I very quickly see the gaps in my knowledge.  This method is far more painful but seems to ...

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Montreal R Workshop: Quantile Regression

April 17, 2012
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Montreal R Workshop: Quantile Regression

Stewart Biology Building, McGill University (Rm N4/17) Monday, April 24, 2012  14h-16h Dr. Arthur Charpentier (UQàM) In this workshop we will examine difference concepts related to quantiles, and practical issues based on R codes. This workshop will present quantile regression, and the idea of iterative least square estimation. It will present an illustration on climate

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Revolution Analytics Spring Webinar Series

April 17, 2012
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The webinar team at Revolution Analytics has put together a great program over the next couple of months. With a mix of guest speakers and Revolution Analytics staff, this series will cover topics as diverse as Big Data with R and Hadoop, integrating R with MS Office, spatial statistics with R, data mining with R, retail marketing analytics, and...

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How NOAA uses R to forecast river flooding

April 16, 2012
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How NOAA uses R to forecast river flooding

Thanks to the lower-than-usual snowfall over most of the US this past winter, there's low risk of major flooding as the snow melts this Spring (for the first time in four years!). Nonetheless, being able to forecast river flood events is of critical importance to local emergency managers, water & electric utilities, river navigation companies, and the US Army...

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ggplot2 Time Series Heatmaps

April 15, 2012
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ggplot2 Time Series Heatmaps

How do you easily get beautiful calendar heatmaps of time series in ggplot2? E.g:From MarginTaleI was impressed by the lattice-based  implementation from Paul Bleicher of Humedica, which you can find referenced in http://blog.revolutionanalytics.c...

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