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I am trying to run the element mesh generator DistMeshfrom FEMAddOns package by using version Mathematica 13.2 under Ubuntu 20.04.

Needs["FEMAddOns`"]
DistMesh[Disk[]]

and got the next messages:

enter image description here enter image description here

and so on... I have tested all the others functions from FEMAddOns and they work properly with version 13.2. Previously I used DistMesh with version Mathematica 12.0 and there were no such problems. Thanks in advance for any advice for overcoming this issue.

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  • $\begingroup$ Confirmed this is a bug, I'll try to update the code in the next few days. But pull requests are welcome of course. $\endgroup$
    – user21
    Commented Feb 1, 2023 at 12:28

1 Answer 1

Reset to default
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Update: The bug is fixed in FEMAddOns version 1.4.6 and if you grab the latest version with

ResourceFunction["FEMAddOnsInstall"][]

things should behave normally.

This is a bug. As a quick work around try this:

Needs["FEMAddOns`"]

Clear[DistMesh`Private`greaterEqualZeroPosition]
DistMesh`Private`greaterEqualZeroPosition[th_] := 
  Flatten[SparseArray[1 - UnitStep[th]]["NonzeroPositions"]];

DistMesh[Disk[]]

I'll push a proper fix in the next few days. Sorry about that.

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  • $\begingroup$ thanks a lot for support! $\endgroup$
    – Oleksii Semenov
    Commented Feb 2, 2023 at 20:21
  • $\begingroup$ It was an excellent idea to implement DistMesh in Mathematica. $\endgroup$
    – Oleksii Semenov
    Commented Feb 2, 2023 at 20:40

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