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Overview Normal distribution Multivariate normal distribution Beta distribution Dirichlet distribution Gamma and lognormal distributions Uniform distribution Performing a PSA Overview Decisions to adopt or reimburse health technologies are often guided by cost-effectiveness analyses. The outcomes needed to conduct cost-effectiveness analyses are simulated using decision-analytic models, which combine information from multiple ... [Read more...]

As a person who’s worked with various programming languages over time, I have become interested in the nuances and overlaps among languages. In particular, concepts related to code syntax and organization–everything from technical concepts such as lexical scoping, to more broad concepts such as importing and naming data–... [Read more...]

Overview Normal distribution Multivariate normal distribution Beta distribution Dirichlet distribution Gamma and lognormal distributions Uniform distribution Performing a PSA Overview Decisions to adopt or reimburse health technologies are often guided by cost-effectiveness analyses. The outcomes needed to conduct cost-effectiveness analyses are simulated using decision-analytic models, which combine information from multiple ... [Read more...]

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Official statistical classifications can be big, complex things. For example, the complete version of the “International Standard Industrial Classification of All Economic Activities, Rev.4” comes as either a 300 page PDF or a 1.3GB Microsoft Access database. Classifications typically have a hierarchy of four or more levels and hundreds or thousands ... [Read more...]

Official statistical classifications can be big, complex things. For example, the complete version of the “International Standard Industrial Classification of All Economic Activities, Rev.4” comes as either a 300 page PDF or a 1.3GB Microsoft Acce... [Read more...]

Official statistical classifications can be big, complex things. For example, the complete version of the “International Standard Industrial Classification of All Economic Activities, Rev.4” comes as either a 300 page PDF or a 1.3GB Microsoft Acce... [Read more...]

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If you’re like me you probably have used derivatives for a huge part of your life and learned a few rules on how they work and behave without actually understanding where it all comes from. As kids we learn some of these rules early on like the power rule ... [Read more...]

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In the last few years, Natural Language Processing (NLP) has become more and more an open multi-lingual task instead of being held back by language, country and legal boundaries. With the advent of commonly used open data regarding natural language processing tasks as available at http://universaldependencies.org one can ... [Read more...]

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by Boxuan Cui, Data Scientist at Smarter Travel Once upon a time, there was a joke: In Data Science, 80% of time spent prepare data, 20% of time spent complain about need for prepare data. — Big Data Borat (@BigDataBorat) February 27, 2013 According to a Forbes article, cleaning and organizing data is the most ... [Read more...]

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A new minor release 0.3.3.4.0 of RcppEigen hit CRAN earlier today, and just went to Debian as well. It brings Eigen 3.3.4 to R. Yixuan once again did the leg-work of bringing the most recent Eigen release in along with the small set of patches we hav... [Read more...]

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Today we will continue our portfolio fun by calculating the CAPM beta of our portfolio returns. That will entail fitting a linear model and, when we get to visualization next time, considering the meaning of our results from the perspective of asset returns. By way of brief background, the Capital ... [Read more...]