# A question about mesh adaptation

**URL:** <https://community.freefem.org/t/a-question-about-mesh-adaptation/3242>\
**Category:** General Discussion\
**Created:** [May 13, 2024, 4:48pm UTC](https://community.freefem.org/t/a-question-about-mesh-adaptation/3242 "2024-05-13T16:48:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jna1g18](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@jna1g18](https://community.freefem.org/u/jna1g18)\
**Post date:** [May 13, 2024, 4:48pm UTC](https://community.freefem.org/t/a-question-about-mesh-adaptation/3242/1 "2024-05-13T16:48:47Z")

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Hi, can someone explain to me exactly what the parameter `err` does in the function `adaptmesh`? I know that it is a measure of error and that it controls the accuracy of the interpolated function, but I’d like a little more insight. Many thanks!