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Rick Wicklin 0
The elliptical heart

Some hearts are famous. For example, there is the "Heart of Gold" (Neil Young), the "Heart of Glass" (Blondie), and the Heart of Darkness (Joseph Conrad). But have you heard of the "Heart of Ellipses"? No? Well, in 2023, Ted Conway published an amusingly titled article, "Total Ellipse of the

Analytics | Learn SAS
Rick Wicklin 0
Peeling a convex hull

This article looks at a geometric method for estimating the center of a multivariate point cloud. The method is known as convex-hull peeling. In two-dimensions, you can perform convex-hull peeling in SAS 9 by using the CVEXHULL function in SAS IML software. For higher dimensions, you can use the CONVEXHULL

Internet of Things
Paul Venditti 0
Why accurate predictive maintenance requires digital twins

Organizations continuously search for innovative ways to optimize their operations and elevate efficiency. One promising frontier is the integration of digital twins for predictive maintenance. However, the true potential of this technology often remains untapped, with many organizations settling for what can be described as “digital shadows.” In this exploration,

Analytics
Rick Wicklin 0
The geometry of Jacobi's method

A colleague remarked that my recent article about using Jacobi's iterative method for solving a linear system of equations "seems like magic." Specifically, it seems like magic that you can solve a certain class of linear systems by using only matrix multiplication. For any initial guess, the iteration converges to

Advanced Analytics | Predictions
Meg Schaeffer 0
Visualizing the future of public health through data modeling

The cold of winter and holiday gatherings push people indoors, causing a surge in influenza hospitalizations. Years of above-normal temperatures in southern states bring a species of mosquito that carries malaria to the US. Declining childhood immunization rates threaten to allow previously eradicated diseases like measles to become endemic again.

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