# Monthly Archives: June 2010

## MMDS 2010

June 21, 2010
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The 2010 Workshop on Algorithms for Modern Massive Data Sets (MMDS 2010) finished up this past Friday (June 18th) at Stanford. This was an exceptionally well organized conference: four days of mind-stretching talks on algorithm development and the challenges of working with massive data sets approached from almost every conceivable angle. The approximately 100 attendees were a diverse group...

## New blog from Rmetrics Foundation

June 21, 2010
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The Rmetrics Foundation (the sharp minds behind the Rmetrics suite of packages for financial analysis in R) have just launched a new blog where you can keep up with the latest Rmetrics news. Amongst the recent news: a ne eBook about data management of Indian financial market data, and a new interface between Rmetrics and AMPL. You can also...

## Example 7.42: Testing the proportionality assumption

June 21, 2010
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In addition to the non-parametric tools discussed in recent entries, it's common to use proportional hazards regression, (section 4.3.1) also called Cox regression, in evaluating survival data.It's important in such models to test the proportionality a...

## A quetion

June 21, 2010
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I posted a question to the R-Mixed-Model mailing list but have not had any responses yet:--------------------------------------------------------------------------------------- Dear All,I wonder if anybody has tried to make glmmBUGS work with JAGS. Mya...

## The police records for 2009 are out.

June 20, 2010
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The 2009 homicide numbers collected by the SNSP (National System of Public Security) are finally out, you can download the data from the ICESI, which is a civic institution not affiliated with the government. If you remember, one of the conclusio...

## Here’s the distribution of the first million digits of the…

June 20, 2010
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Here’s the distribution of the first million digits of the square root of two’s decimal expansion. Number of digits | is:   0's |  99 818  1's |  98 926  2's | 100 442  3's | 100 191  4's | 100 031  5's | 100 059  6's |  99 885  ...

## QSPR modeling with signatures

June 20, 2010
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I had to dig deep to find posts on QSAR modeling. There are quite a few on QSAR in Bioclipse, but that focuses on the descriptor calculation. In a quick scan, I could only spot two modeling posts:The CDK/Metabolomics/Chemometrics Unconference resultsWh...

## R-INLA package

June 19, 2010
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Another R package for mixed effect modeling. Looks promising.

## Estimating Probability of Drawdown

June 19, 2010
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I've shown several examples of how to use LSPM's probDrawdown function as a constraint when optimizing a leverage space portfolio.  Those posts implicitly assume the probDrawdown function produces an accurate estimate of actual drawdo...

## More powerful iconv in R

June 19, 2010
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The R function iconv converts between character string encodings, for example, from the locale dependent encoding to UTF-8: __ iconv("foo", to="UTF-8") "foo" However, R has long-running trouble with embedded null characters ('') in strings. Hence, if we try to convert to an encoding that permits embedded null characters, iconv will fail: __ iconv("foo", to="UTF-16")