# Plot an function

**URL:** <https://community.freefem.org/t/plot-an-function/474>\
**Category:** General Discussion\
**Created:** [June 16, 2020, 9:59am UTC](https://community.freefem.org/t/plot-an-function/474 "2020-06-16T09:59:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Aicha](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@Aicha](https://community.freefem.org/u/Aicha)\
**Post date:** [June 16, 2020, 9:59am UTC](https://community.freefem.org/t/plot-an-function/474/1 "2020-06-16T09:59:03Z")

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Hi,  
i want to plot with FF++ the graph of the function u(t,x) defined by

u(t,x)= -2\*\nu\* \alpha(t)+b(t)\*x +c(t), \ t \in [0,1], x \in [0,1]

where \nu=0.01 and

b'(t)=-b^2(t)+f(t),

\alpha(t)= \exp(-\int b(t) dt),

c'(t)=-b(t) c(t) +g(t),

f(t)=\sin(t), g(t)= \cos(t)

How we can do this? what i try don’t give results.

Regards