Blogs

Learn SAS

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

Rick WicklinJuly 29, 2019 0

Vectorize the computation of the Mandelbrot set in a matrix language

When my colleague, Robert Allison, blogged about visualizing the Mandelbrot set, I was reminded of a story from the 1980s, which was the height of the fractal craze. A research group in computational mathematics had been awarded a multimillion-dollar grant to purchase a supercomputer. When the supercomputer arrived and got

English

Learn SAS | Programming Tips

Rick WicklinJuly 24, 2019 0

Implement the Gumbel distribution in SAS

SAS supports more than 25 common probability distributions for the PDF, CDF, QUANTILE, and RAND functions. Of course, there are infinitely many distributions, so not every possible distribution is supported. If you need a less-common distribution, I've shown how to extend the functionality of Base SAS (by using PROC FCMP)

English

Learn SAS | Programming Tips

Kathryn McLawhornJuly 19, 2019 0

How the RANK procedure calculates ranks with groups and ties

The RANK procedure (PROC RANK) is useful for ranking numeric variables in a data set across observations. You often see PROC RANK used to rank data into quartiles, deciles, or percentiles. This action requires that you use the GROUPS= option in the PROC RANK statement. This blog answers three questions

English

Previous 1 … 184 185 186 187 188 … 416 Next