Grasshopper

algorithmic modeling for Rhino

Culling points from a list

For some reason I cant find this searching. I have two lists, each a list of x,y,z points, but the lists are different lengths and the index's of the lists are irrelevant. How do I cull the points in one list from the second list? I can't seem to find this, it should be so simple!

Thanks!

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Replies to This Discussion

Permalink Reply by Daniel González Abalde on September 2, 2015 at 8:09am

How do I cull the points in one list from the second list?

To cull points we must follow some criteria, which is the criteria?

Permalink Reply by Ol OneEye on September 2, 2015 at 8:32am

Remove the points in the first list, from the second list. (the second list is always shorter)

Permalink Reply by ng5 Alex on September 2, 2015 at 8:34am

merging the two list into one and then culling duplicates would work?

Permalink Reply by Andrew Heumann on September 2, 2015 at 9:05am

use "Set difference" to eliminate the points in list A that are present in list B.

Permalink Reply by Ol OneEye on September 2, 2015 at 10:40am

excellent!! Thanks

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