# Euclidean norm of a vector

**URL:** <https://community.freefem.org/t/euclidean-norm-of-a-vector/357>\
**Category:** General Discussion\
**Created:** [April 19, 2020, 3:20pm UTC](https://community.freefem.org/t/euclidean-norm-of-a-vector/357 "2020-04-19T15:20:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Biki](https://avatars.discourse-cdn.com/v4/letter/b/898d66/32.png) [@Biki](https://community.freefem.org/u/Biki)\
**Post date:** [April 19, 2020, 3:20pm UTC](https://community.freefem.org/t/euclidean-norm-of-a-vector/357/1 "2020-04-19T15:20:48Z")

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Hello! I’m so sorry to bother you but I’m new to FreeFEM and I have some trouble to solve this problem. I would like to plot in each point of the domain the intensity (i.e. |u|) of the displacement field u (solution of an elastic problem) in the following setting:

fespace Vh(Th,[P1,P1]);  
macro u [u0,u1] //  
Vh u;

If anyone could help me it would be great. Thank you very much in advance!

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [April 19, 2020, 5:43pm UTC](https://community.freefem.org/t/euclidean-norm-of-a-vector/357/2 "2020-04-19T17:43:41Z")

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You should read the [documentation](https://doc.freefem.org/pdf/FreeFEM-documentation.pdf).