Issue with boundary grains

[Remsdel]

I am aiming at removing grains that are touching the edges of an EBSD map by using the isboundary function. However, I noticed that grains that are not directly touching the edges but that are touching an unindexed area that it itself touching an edge are also removed. Is there a way to avoid this so that only grains that are actually touching the map edges are removed? See picture for visual illustration.

[kilir]

Hi,
if you compute grains using gridified /EBSDsquare on ebsd('indexed') every grain touching a non-indexed area is considered by isBoundary. In that case isOuterBoundary is the function that hopefully only finds grains touching the outer map boundary.
Hope that helps.
Cheers,
Rüdiger

[Remsdel]

Thanks, it seems that I do not have this function in my version of MTEX (5.11.2). Could it be that it was only introduced in a later version? Cordially, Rémi From: Rüdiger Kilian ***@***.***> Sent: Monday, March 9, 2026 6:23 PM To: mtex-toolbox/mtex ***@***.***> Cc: Delville Rémi ***@***.***>; Author ***@***.***> Subject: Re: [mtex-toolbox/mtex] Issue with boundary grains (Discussion #2520) Hi, if you compute grains using gridified /EBSDsquare on ebsd('indexed') every grain touching a non-indexed area is considered by isBoundary. In that case isOuterBoundary is the function that hopefully only finds grains touching the outer map boundary. Hope that helps. Cheers, Rüdiger — Reply to this email directly, view it on GitHub<#2520 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASW2MWPQEWGLSRGGU4GAXG34P34X3AVCNFSM6AAAAACWLYCP26VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTMMBVGYYDEMI>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[kilir]

Yes, it's only in the more recent mtex versions.

[Remsdel]

Would it possible to make it available for the 5.11 version as well? (I am facing a lot of other issues with the 6 version)

[ralfHielscher]

We would really like to address your issues with mtex-6. Please describe them :)

[Remsdel]

Yes, I am glad to describe it for you. It is in fact rather strange. When opening the ebsd variable under mtex 6.1.1, it appears to be empty without the usual properties visible (see screenshot below). Any operations with it give an error message because it is empty. Strangely it does not apply to the grains variable (see screenshot). The same variables were opened with mtex-5.11.2 without a problem (I have been using the later for a long time without issues). I running matlab 2024a on windows 11. ***@***.*** From: Ralf Hielscher ***@***.***> Sent: Wednesday, March 11, 2026 5:34 PM To: mtex-toolbox/mtex ***@***.***> Cc: Delville Rémi ***@***.***>; Author ***@***.***> Subject: Re: [mtex-toolbox/mtex] Issue with boundary grains (Discussion #2520) We would really like to address your issues with mtex-6. Please describe them :) — Reply to this email directly, view it on GitHub<#2520 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASW2MWMPFH4ALF7AUAQZ5AL4QGINVAVCNFSM6AAAAACWLYCP26VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTMMBYGYYDSMI>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>