Group by function does not work properly

Lists-Logic
1

Hi

Im trying to group a list of points by their Z coordinates but after they are grouped there are points which have the same z coordinates are grouped into two groups. Im not sure if it’s some kind of bug or if Im doing something wrong.

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2

You could try to use a Flatten node or manipulate the List@Level, see on this page:
http://dynamoprimer.com/en/06_Designing-with-Lists/6-3_lists-of-lists.html

3

The list is already flattened. I have also pruned it to avoid any inaccuracies.

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4

There may be slight variances in the Z values that Dynamo is rounding? Just a guess.
Try getting the Z value and rounding it before using List.GroupByKey.

5

My guess is that they are slightly off.

List.GroupByKey instead, getting the points Z values and round them to the 3rd decimal digit with the Math.Round node.

6

Nick you are like 30 seconds ahead of me today. :smile:

7

If ya aint first, yer last!

8

Hehe,

yeah. it worked! Thanks!