Blogs

Learn SAS

Learn about the latest tips, tutorials, upcoming events and certifications

Analytics | Learn SAS

Rick WicklinOctober 20, 2021 0

An introduction to genetic algorithms in SAS

A genetic algorithm (GA) is a heuristic optimization technique. The method tries to mimic natural selection and evolution by starting with a population of random candidates. Candidates are evaluated for "fitness" by plugging them into the objective function. The characteristics of the better candidates are combined to create a new

English

Data Management | Learn SAS | Programming Tips

Leonid BatkhanOctober 14, 2021 0

Introducing TRIMS function to remove any leading and/or trailing characters from SAS strings

Leonid Batkhan introduces multipurpose TRIMS function that removes any leading, trailing or both leading and trailing characters from SAS strings.

English

Learn SAS

Rick WicklinOctober 11, 2021 0

The knapsack problem: Binary integer programming in SAS/IML

Many optimization problems in statistics and machine learning involve continuous parameters. For example, maximum likelihood estimation involves optimizing a log-likelihood function over a continuous domain, possibly with constraints. Recently, however, I had to solve an optimization problem for which the solution vector was a 0/1 binary variable. To solve the

English

Previous 1 … 111 112 113 114 115 … 412 Next