Monthly Archives: March 2010

The Economist reports on the information explosion

March 1, 2010
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The current edition of The Economist includes a "special report on managing information", targeting the issue of the information explosion / data deluge / whatever you want to call it these days. It includes the usual attributes of the problem: data is being collected faster than we can store it, astronomers are creating petabytes of data daily, the usual....

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REvolution Computing hiring parallel computing developer

March 1, 2010
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We're looking for a programmer with experience in high-performance computing and the R system to work on the ParallelR suite and other data-analysis projects. Sound like anyone you know? Check out the details at the link below. REvolution Computing careers: Parallel Computing Developer

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Example 7.24: Sampling from a pathological distribution

March 1, 2010
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Example 7.24:  Sampling from a pathological distribution

Evans and Rosenthal consider ways to sample from a distribution with density given by:f(y) = c e^(-y^4)(1+|y|)^3where c is a normalizing constant and y is defined on the whole real line.Use of the probability integral transform (section 1.10.8) is not feasible in this setting, given the complexity of inverting the cumulative density function.The Metropolis--Hastings algorithm is a Markov...

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Bayes fits the data less closely than maximum likelihood

March 1, 2010
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Lluis Bermudez writes: I'm from University of Barcelona and I've using "arm" package to obtain posterior estimates of glm parameters. I usually worked with "glm" function, but I need more than a point estimation. The problem is that when using...

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End of the month investment

March 1, 2010
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End of the month investment

It is know, that the first day of the month provides bullish edge. According to Quantifiable edges not all the months are equal. So, I made a test on S&P500 index, from January, 1980 until February, 2010. It is true, March isn’t the best month to run this strategy. Only 3 months have significant results

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