Hi,
Thanks Herbert and Hans, your solutions work both
Fabrice

2016-08-16 20:35 GMT+02:00 Herbert Voss <Herbert.Voss@fu-berlin.de>:

> Am 16.08.2016 um 16:52 schrieb Fabrice Couvreur:
>
> \usemodule[pgfplots]
>>
>> \pgfplotsset{compat=1.13}
>> \usetikzlibrary[intersections]
>> \usepgfplotslibrary[fillbetween]
>>
>> \starttext
>>
>> \starttikzpicture[/pgf/declare
>> function={f(\x)=(1/8)*(\x^3-2.5*\x^2-3*\x+4.5);},]
>> \switchtobodyfont[8pt]
>> \startaxis
>>
>
> [...]
> \starttext
>
> \starttikzpicture[
>   /pgf/declare function={f(\x)=(1/8)*(\x^3-2.5*\x^2-3*\x+4.5);},
>   font={\switchtobodyfont[8pt]}
> ]
> %
> \startaxis
> [...]
>
> Herbert
>
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