# How to impact tecplot file(dat) into freefem++

**URL:** https://community.freefem.org/t/how-to-impact-tecplot-file-dat-into-freefem/217
**Category:** General Discussion
**Created:** [January 13, 2020, 7:51am UTC](https://community.freefem.org/t/how-to-impact-tecplot-file-dat-into-freefem/217 "2020-01-13T07:51:59Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![xlzheng](https://avatars.discourse-cdn.com/v4/letter/x/2acd7d/32.png) [@xlzheng](https://community.freefem.org/u/xlzheng)
#### Post date: [January 13, 2020, 7:52am UTC](https://community.freefem.org/t/how-to-impact-tecplot-file-dat-into-freefem/217/1 "2020-01-13T07:52:00Z")

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In my example, I want to compare the numerical results(from freefem++) to the analytical solutions, the analytical solutions is a dat file, I need to impact it into freefem++, but I don’t know modify the file.