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November 12, 2012 0

How do you hire a Chief Data Scientist? That's not a hypothetical question: I know of at least three companies that are actively looking for a "Chief Data Scientist" at the moment. Hiring the right person is harder than you'd think. Whether or not a Chief Data Scientist is a

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Waynette TubbsNovember 9, 2012 0

Friday's Innovation Inspiration - Parsing for 100% comparison

Did I tell you that I went to Andrew Kuligowski's hands-on workshop while I was at MWSUG 2012? Actually, I only attended the first portion of his session; it didn't make sense for me to take up a computer since I'm not a programmer. His workshop was to teach users how to parse useful data from unusual

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Rick WicklinNovember 7, 2012 0

Constructing block matrices with applications to mixed models

The other day I was constructing covariance matrices for simulating data for a mixed model with repeated measurements. I was using the SAS/IML BLOCK function to build up the "R-side" covariance matrix from smaller blocks. The matrix I was constructing was block-diagonal and looked like this: The matrix represents a

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