2249 search results for "Map"

The Next Big Thing: SAS and SPSS!…wait, what?

April 15, 2010
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The Next Big Thing: SAS and SPSS!…wait, what?

Thanks to the R Bloggers aggregator I came across Yihui Xie’s post on a piece currently making the rounds about statistical analysis platforms. In The Next Big Thing, AnnMaria De Mars makes the argument that R—as a statistical computing platform—is not well suited for what she views as the next big things in data

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In case you missed it: March Roundup

April 13, 2010
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In case you missed them, here are some articles from last month of particular interest to R users. We reviewed a special report in The Economist on the "Data Deluge" and the growing importance of statistical analysis in business. One section mentioned R specifically. We announced that Zack Urlocker, formerly responsible for engineering and marketing for the open-source database...

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Historical / Future Volatility Correlation Stability

April 11, 2010
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Historical / Future Volatility Correlation Stability

Michael Stokes, author of the MarketSci blog recently published a thought-provoking post about the correlation between historical and future volatility (measured as the standard deviation of daily close price percentage changes). This post is intended...

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Maximum Probability of Profit

April 9, 2010
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Maximum Probability of Profit

To continue with the LSPM examples, this post shows how to optimize a Leverage Space Portfolio for the maximum probability of profit. The data and example are again taken from The Leverage Space Trading Model by Ralph Vince. These optimizaitons take ...

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Gravity Game in R

April 8, 2010
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Gravity Game in R

So why should R only be used for ’serious’ stuff? No longer! I’ve written the following code in R which executes a little gravitational physics game. The goal of the game is simple. You supply a velocity and direction to a spaceship with the goal of getting the ship to the

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Example 7.31: Contour plot of BMI by weight and height

April 5, 2010
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Example 7.31: Contour plot of BMI by weight and height

A contour plot is a simple way to plot a surface in two dimensions. Lines with a constant Z value are plotted on the X-Y plane.Typical uses include weather maps displaying "isobars" (lines of constant pressure), and maps displaying lines of constant e...

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abbreviating personality measures in R: a tutorial

March 31, 2010
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abbreviating personality measures in R: a tutorial

A while back I blogged about a paper I wrote that uses genetic algorithms to abbreviate personality measures with minimal human intervention. In the paper, I promised to put the R code I used online, so that other people could download and use it. I put off doing that for a long time, because the

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TTR_0.20-2 on CRAN

March 30, 2010
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TTR_0.20-2 on CRAN

An updated version of TTR is now on CRAN. It fixes a couple bugs and includes a couple handy tweaks. Here's the full contents of the CHANGES file:TTR version 0.20-2 Changes from version 0.20-1NEW FEATURES:Added VWAP and VWMA (thanks to Brian Peterson...

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Lessons Learned from EC2

March 24, 2010
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Lessons Learned from EC2

A week or so ago I had my first experience using someone else’s cluster on Amazon EC2. EC2 is the Amazon Elastic Compute Cloud. Users set up a virtual computing platform that runs on Amazon’s servers “in the cloud.” Amazon EC2 is not just another cluster. EC2 allows the user to create a disk image containing an operating system...

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Playing with the ‘playwith’ package

March 23, 2010
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Playing with the ‘playwith’ package

Abilities of R for creating graphics is great, but one thing I always missed is the possibility of creating interactive plots and being able to look at graphs while changing one ore more parameters. I know that there is rggobi, but so far I always ran into problems with flexibility each time I wanted to

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