On Tue, 16 Nov 2010 13:59:23 +1100, Michael Carey <mpc20 at aapt.net.au>
wrote:
> On Mon, 2010-11-15 at 22:21 +0100, Jaime Villate wrote:
>>
>> Have you already installed xmaxima? without it plotdf will not work.
>>
> Yes I pointed out that I could graph on my machine.
>
> Thank you, Mick
That does not mean you do have xmaxima:
plot2d(.5*(1-y/4)*y,[y,-2,6])$
will work without xmaxima, because it will use gnuplot by default.
Now try it this way:
plot2d(.5*(1-y/4)*y,[y,-2,6],[plot_format,xmaxima])$
if you don't have xmaxima, it will fail. If it works, then
plotdf(.5*(1-y/4)*y,[x,-2,6],[y,-2,6])$
should also work (plotdf will not work with gnuplot).
Regards,
Jaime