Grasshopper

algorithmic modeling for Rhino

Dot product in a list only once per pair?

Hi everyone,

I have a list of vectors and I want to calculate the dot product of all the possible combinations just once. For example, if x1*x2 is calculated, I don't want to have x2*x1 again in the results, which is what happens if I graft one of the inputs.  Is there a simple way to do this?

Thanks!

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Replies to This Discussion

Permalink Reply by David Rutten on March 27, 2016 at 5:09am

How do you want the output to be structured? The easiest solution is to use the [Cross Reference] component with LowerTriangleStrict matching, which will only do pairs once and will not operate on the same vectors.

Permalink Reply by John Cyrillos on March 28, 2016 at 1:18pm

That works great! Thanks!

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