Hi Everyone
I think I'm being dumb but I have a set of 2d data (2d array) z
(100x100) which I need to plot - I have a nominal set of x and y
positions say:
x = linspace(0,100)
y = linspace(0,100)
Now the actual positions of the points in z are given by the following:
u,v = meshgrid(x,y)
phi = arctan2(v,u)
theta = arcsin(u/cos(phi))
so I have three 2d arrays (100x100) which describe the postion
(phi,theta) of the points in z
How do I go about plotting these say using imshow?
Cheers
Ross
···
--
Ross Williamson
University of Chicago
Department of Astronomy & Astrophysics
773-834-9785 (office)
312-504-3051 (Cell)
imshow requires the data to be regularly spaced. use pcolor instead.
Also, to be clear, pcolor() can take 1-D X and Y arguments, but only if it is regular. If the coordinates are irregular, then you need to use 2D X and Y arguments.
Ben Root
···
On Wed, Jul 7, 2010 at 5:15 PM, Ross Williamson <rosswilliamson.spt@…287…> wrote:
Hi Everyone
I think I’m being dumb but I have a set of 2d data (2d array) z
(100x100) which I need to plot - I have a nominal set of x and y
positions say:
x = linspace(0,100)
y = linspace(0,100)
Now the actual positions of the points in z are given by the following:
u,v = meshgrid(x,y)
phi = arctan2(v,u)
theta = arcsin(u/cos(phi))
so I have three 2d arrays (100x100) which describe the postion
(phi,theta) of the points in z
How do I go about plotting these say using imshow?
Cheers
Ross
–
Ross Williamson
University of Chicago
Department of Astronomy & Astrophysics
773-834-9785 (office)
312-504-3051 (Cell)
This SF.net email is sponsored by Sprint
What will you do first with EVO, the first 4G phone?
Visit sprint.com/first – http://p.sf.net/sfu/sprint-com-first
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users