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Rick WicklinJuly 24, 2024 0

QPSOLVE: A new SAS IML function for quadratic optimization

Since the pandemic began in 2020, the SAS IML developers have added about 50 new functions and enhancements to the SAS IML language in SAS Viya. Among these functions are new modern methods for optimization that have a simplified syntax as compared to the older 'NLP' functions that are available

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Learn SAS | Programming Tips

Rick WicklinJuly 22, 2024 0

How to use keyword-value pairs when calling SAS IML subroutines

Just like the SAS DATA step, the SAS IML language supports both functions and subroutines. A function returns a value, so the calling syntax is familiar: y = func(x1, x2); /* the function returns one value, y */ In this syntax, the input arguments are x1 and x2. The

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Analytics | Learn SAS | Programming Tips

Rick WicklinJuly 15, 2024 0

Isotonic regression: An application of quadratic optimization

Isotonic regression (also called monotonic regression) is a type of regression model that assumes that the response variable is a monotonic function of the explanatory variable(s). The model can be nondecreasing or nonincreasing. Certain physical and biological processes can be analyzed by using an isotonic regression model. For example, a

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