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help on polar_surface routine [message #29807]

Tue, 12 March 2002 10:10

florence.henry
Messages: 2
Registered: March 2002

Junior Member

Hello,

I'm trying to use the polar_surface routine, and I have one question about it.
Here is the instruction I give :
zz = polar_surface(z,r,t,missing=zmin,spacing=[ds,ds])
r ranges between 5 and 100
t ranges between 0 and 2*pi

why the resulting zz is not centered on 0 ?

For example :

r=findgen(51)/50.
theta=findgen(25)*15.*!dtor
x=r#cos(theta)
y=r#sin(theta)
z=exp(-r^2)#replicate(1.,25)
zz=polar_surface(z,r,theta,/grid)
surface,z,x,y
window,2
surface,zz

the "surface,z,x,y" will give a plot centered on 0
and "surface,zz" won't.

Anyone can help me to have my plot centered?

-----
Florence.Henry@obspm.fr
Observatoire de Paris

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