UK house prices visualised with googleVis-0.2.16

June 5, 2012 | 0 Comments

A new version of googleVis has been released on CRAN and the project site. Version 0.2.16 adds the functionality to plot quarterly and monthly data as a motion chart. To illustrate the new feature I looked for a quarterly data set and stumbled across t...
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Setting the initial view of a motion chart in R

September 30, 2011 | 0 Comments

Following on from my article about accessing and plotting World Bank data with R I want to talk about how to change the initial view of a motion chart.Over the last couple of weeks I have been asked a view times how to do this. For instance Stephen O'G...
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Example 8.23: Expanding latent class model results

January 31, 2011 | 0 Comments

In Example 8.21 we described how to fit a latent class model to data from the HELP dataset using SAS and R (using poLCA(), and then followed up in example 8.22 using randomLCA(). In both entries, we classified subjects based on their observed (manifes...
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The only thing smiling today is Volatility

May 21, 2010 | 0 Comments

With the stock market freaking out and all, I figured I should take a look at how volatility was being priced in the option market. The CBOE generously provides snapshots of market data for anyone interested to download. By using this data, we can calculate the markets ‘implied volatility’, or ...
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