# How do I calculate error on each node?

**URL:** <https://fenicsproject.discourse.group/t/how-do-i-calculate-error-on-each-node/5503>\
**Category:** Uncategorized\
**Created:** [April 4, 2021, 11:07pm UTC](https://fenicsproject.discourse.group/t/how-do-i-calculate-error-on-each-node/5503 "2021-04-04T23:07:22Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\
**Post date:** [April 6, 2021, 6:21pm UTC](https://fenicsproject.discourse.group/t/how-do-i-calculate-error-on-each-node/5503/2 "2021-04-06T18:21:55Z")

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Please see the attached tutorial:  
[https://fenicsproject.org/pub/tutorial/html/.\_ftut1004.html#\_\_\_sec35](https://fenicsproject.org/pub/tutorial/html/._ftut1004.html#___sec35)

For writing xdmf files, see for instance: [Loading xdmf data back in - #4 by dokken](https://fenicsproject.discourse.group/t/loading-xdmf-data-back-in/1925/4)

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