Re: [Maxima-discuss] draw2d parametric fails on a function defined by cases

[Jaime V. <vi...@fe...>]

On 10/10/24 15:39, Jaime Villate wrote:
>
>
> On 10/10/24 01:48, Robert Dodier wrote:
>> On Wed, Oct 9, 2024 at 2:33 PM Eduardo Ochs<edu...@gm...>  wrote:
>>
>>>    P(t) := if t <= 6 then [t,4] else [6,10-t];
>>>    draw2d(parametric(P(t)[1], P(t)[2], t,0,10));
>>>
>>> ...
>>> yields this error:
>>>
>>>    draw2d (parametric): non defined variable
>> As a workaround, one could say something like
>>
>> P1(t) := if t <= 6 then t else 6;
>> P2(t) := if t <= 6 then 4 else 10 - t;
>> draw2d (parametric (P1(t), P2(t), t, 0, 10));
>
> Or you could also use instead:
>
> plot2d ([parametric, P1(t), P2(t), [t, 0, 10]]);
>
Sorry; that works the same as draw2d, but what I really meant was:

plot2d ([parametric, P(t)[1], P(t)[2], [t, 0, 10]]);

which does not give an error as draw2d does.

Regards,

Jaime