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DST is a b!tch, be careful with POSIX in a stupid timezone

April 27, 2011
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DST is a b!tch, be careful with POSIX in a stupid timezone

At the department we have been analyzing some transaction data for some time. We got a new dataset with lots of transactions. Once you need interpurchase (IPT) times, posix is quite useful, as you can easily difference transactions to generate IPTs.So ...

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Quickly adapt starting values in MCMC using paste()

January 15, 2011
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Quickly adapt starting values in MCMC using paste()

Waiting for convergence of MCMC models can take some time, therefore it may be a good idea to use better starting values. Using paste, one can quickly convert any (parameter) vector in the workspace into a R-style vector (with c()). Here's a function t...

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