2151 search results for "Map"

Region Of Interest analysis of BOLD data

Region Of Interest analysis of BOLD data

For my research I do Region-Of-Interest (ROI) analyses of BOLD fMRI data. That is, we look at how brain activity develops in certain predefined brain regions during an experiment. On this site I describe a script that automates these analyses, using SP...

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R/Finance 2009 Presentations Online

May 4, 2009
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R/Finance 2009 Presentations Online

Posted to the R-SIG-Finance mailing list today:For those who missed it, the slides for the R/Finance 2009 tutorialsand presentations are now available on RinFinance.comhttp://www.RinFinance.com/presentationsWe want to thank everyone who traveled to Chi...

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RSI(2) with Position Sizing

May 1, 2009
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RSI(2) with Position Sizing

Though it's more than two weeks later, here's the second post in the series that will demonstrate how to build, test, and implement a trading strategy with R. You can find the first post here.The first post replicated this simple RSI(2) strategy from ...

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R/Finance 2009 Overview

April 28, 2009
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R/Finance 2009 Overview

The first international R/Finance 2009 conference in Chicago, IL was a huge success! David Smith from REvolution Computing has written a great summary of the entire event. I'll take the lazy route and point you to his blog post. :)The first internati...

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opentick is no more

April 17, 2009
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opentick is no more

After a year of "we plan to accept new subscribers shortly", opentick has shut its doors completely. As of March 20th, the opentick service is no longer available.From opentick.com:3/16/2009To opentick subscribers, friends, supporters, contributors an...

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Webscraping using readLines and RCurl

April 14, 2009
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Webscraping using readLines and RCurl

There is a massive amount of data available on the web. Some of it is in the form of precompiled, downloadable datasets which are easy to access. But the majority of online data exists as web content such as blogs, news stories and cooking recipes. With precompiled files, accessing the data is fairly straightforward; just The post Webscraping...

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Testing RSI(2) with R, First Steps

April 13, 2009
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Testing RSI(2) with R, First Steps

This is the first of a series of posts that will demonstrate how to build, test, and implement a trading strategy using my favorite FOSS, R. I chose the RSI(2) strategy because it has gotten considerable attention on trading blogs over the past 6 mont...

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Helpful statistical references

April 7, 2009
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Helpful statistical references

In a previous article I provided a list of R programming resources. As a complement to that post, I’ve compiled a list of statistically oriented websites that colleagues and I have found useful below. For the most part, these sites focus on statistics and quantitative research methods rather than programming. This first grouping lists sites The post Helpful...

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SNA with R: Loading your network data

April 1, 2009
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SNA with R: Loading your network data

We are interested in Social Network Analysis using the statistical analysis and computing platform R. As usual with R, the documentation is pretty bad, so this series collects our notes as we learn more about the available packages and how they work. We use here the statnet group of packages, which seems to be the...

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Identify Data Points in Off-Screen R Graphics Devices

March 16, 2009
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Today Ruya Gokhan Kocer asked me how to use the R function identify() in off-screen graphics devices. Actually it’s pretty easy as long as we obtain the list returned by identify(pos = TRUE). For example, # open a windows device x11() x = rnorm(20) y = rnorm(20) plot(x, y) # identify 5 points id = identify(x, y, n = 5, pos =

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