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Author: Lonnie Chrisman

Lonnie Chrisman

Lonnie Chrisman

Lonnie Chrisman is Lumina's Chief Technical Officer, where he heads engineering and development of Analytica. He has a PhD in Artificial Intelligence and Computer Science from Carnegie Mellon University and a Bachelor’s degree in Electrical Engineering from University of California at Berkeley.

Author Posts

12/10/2017 | Blogs, Modeling tips & tricks, Videos

Hiding and disabling model user-interface controls

Analytica 5.0 added several features that allow you to improve your end-user interfaces that you create for your model. One of those enhancements is the ChangeNodeVisibility( )…

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11/14/2017 | Blogs, Modeling tips & tricks, Videos

An expression to crop an image

In this video short, I create an expression that extracts a small image from a larger one. In other words, it crops the original image to a smaller rectangular region of the image…

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11/14/2017 | Blogs, Modeling tips & tricks, Videos

How to resize an image

This 2 minute video short shows you how to resize an image after you’ve pasted it into a diagram.

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11/08/2017 | Blogs, Modeling tips & tricks, Videos

The length of an index

Finding the length of an index is obviously pretty trivial. But there are several ways to do find it, and there are some “gotchas” if you aren’t careful. The IndexLength function…

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11/07/2017 | Blogs, Modeling tips & tricks, Videos

Analytica 5 video short: How to display negative numbers in red

The Analytica 5 Video shorts series — short (under 5 minutes) videos showcasing an individual topic or feature in Analytica. The series primarily focuses on features that …

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10/28/2017 | Blogs, Modeling tips & tricks, Videos

How to draw an influence diagram in 3 minutes

Learn to visualize decision-making and boost your analytical skills with this guide on drawing influence diagrams.

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10/27/2017 | Blogs, Modeling tips & tricks, Videos

Analytica toolbar

Discover the updates to the Analytica toolbar. See what is there and how you can use it.

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02/19/2016 | Blogs, Decision analysis & multi-criteria, Modeling tips & tricks

Marginal abatement: adding a dimension

In my earlier blog article, on marginal abatement, I explained what a Marginal Abatement graph is and how to set up such a graph in Analytica. In this article, I’m going to…

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