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Peter StyliadisJune 29, 2022 0

Getting Started with Python Integration to SAS® Viya® - Part 7 - Filtering CAS Tables

Welcome to the seventh installment in my series Getting Started with Python Integration to SAS Viya. In previous posts, I discussed how to connect to the CAS server, how to execute CAS actions, and how to work with the results. Now it's time to learn how to filter CAS tables. Load and explore data

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Analytics | Data Visualization | Programming Tips

Rick WicklinJune 29, 2022 0

Compute the multivariate t density function

A previous article shows how to compute the probability density function (PDF) for the multivariate normal distribution. In a similar way, you can compute the density function for the multivariate t distribution. This article discusses the density function for the multivariate t distribution, shows how to compute it, and visualizes

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Analytics | Programming Tips

Rick WicklinJune 27, 2022 0

The derivative of a quantile function

Recently, I needed to solve an optimization problem in which the objective function included a term that involved the quantile function (inverse CDF) of the t distribution, which is shown to the right for DF=5 degrees of freedom. I casually remarked to my colleague that the optimizer would have to

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