Hi Ilan,
> How do you display a two dimensional surface, like in Matlab, using the
> SpreadSheet ?
It depends on the data. If you import the images.nc file
(from ftp://www.ssec.wisc.edu/pub/visad-2.0/images.nc) and
select Cell/Edit Mappings, you'll see the MathType:
(Time -> ((x, y) -> val)
This indicates that images.nc contains a time sequence
of images.
Click on "Clear All", then:
1. click "x" then "X" (to map x -> XAxis)
2. click "y" then "Y" (to map y -> YAxis)
3. click "val" then "Z" (to map val -> ZAxis)
4. click "Time" then "Anim" (to map Time -> Animation)
This will create an animated 2-D surface.
If you import a GIF or JPEG image and select Edit Mappings,
you'll see the MathType:
(ImageElement, ImageLine) -> (Red, Green, Blue))
You can see a surface with the mappings:
ImageElement -> XAxis
ImageLIne -> YAxis
Red -> ZAxis
Red -> Red
Green -> Green
Blue -> Blue
The basic idea is that if the data's MathType contains any
part like: (...(x, y) -> (...z...)) then you can get a 2-D
surface with mappings:
x -> XAxis
y -> YAxis
z -> ZAxis
Good luck,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
