[Maxima] show gradient vectors orthogonal to level curves

[Jaime Villate]

On Seg, 2009-10-26 at 17:55 +0100, Adam Majewski wrote:
> I use windows instaler.
> In Maxima 5.16.3 I have xmaxima, but not in bin directory of 5.19.2

You should install the latest version of xmaxima that is distributed
with Maxima 5.19.2.
Regards,
Jaime