getting axis equal?



Hello all,

I am plotting some vectors in 3D space with the draw3d command,
but somehow the data units on the x, y and z-axis are not equal.
I would like to get them equal so that it is easier to see which
vectors are perpendicular to each other.  So what I basically
need is a Maxima equivalent for Matlab's 'axis equal' command.

I have tried adding the

  proportional_axes=xyz

option, but this didn't seem to help.

My .wxm file (for wxMaxima 0.8.5) is online at

http://www.kuleuven-kortrijk.be/~bartv/silver_mueller.wxm

I'm not using Maxima that often, so any other comments on my
Maxima coding style and improvements on my code are welcome.

Regards,
Bart

-- 
	"Share what you know.  Learn what you don't."