Remapping Tree based on discreet values

[Joshua_Halliday]

Hello,
I need a way to organise a lot data based into individual branches using Z coordinates. Effectively I have a lot of curves all grouped spacial around set Z-values (ie, five curves at Z 20, three curves at Z 40, etc). They are currently flattened, but is there a way to test which Z-value they are at, and group like Z-values into specific branches?
Thanks

[magicteddy]

Hi,

If your curves are indeed planar, testing the Z coordinate of a point on those curves should do the trick.

SortCurvesByZ.gh (9.1 KB)

[AndersDeleuran]

Have a look at the Python scripts posted here:

How to sort surfaces by z coordinates in ghpython

I was just looking up some old code and was reminded of the groupby function from itertools, which is another relevant approach. Here’s an example that demonstrates how to use the same key lambda function (a normal Python function will also work) to first sort then group a list of surfaces by Z: [2021-06-19 13_18_57-Grasshopper - 210618_SortSurfacesByZIntoLists_01_] 210618_SortSurfacesByZIntoLists_01.gh (15.2 KB) I’ll stop now

[Jacques_Gaudin]

This is a similar question to this one:

Grouping items into list / tree branches / paths according to an "id"

It’s quite trivial with a Python script (if it’s acceptable for you): [image] In this example, numbers comprised between 0 and 1 are sorted according to their first decimal digit. The ids must be hashable, i.e. a value like a string a number etc. that is immutable. id_sorting.gh (8.7 KB)

Hope you’ll find this useful.

[Joseph_Oster]

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[Joshua_Halliday]

Works perfectly thanks!!