| Map_Image() [message #47089] |
Fri, 20 January 2006 02:51 |
Liberum
Messages: 48
Registered: September 2005
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Hi Everyone,
As my IDl edification continues, let me express my gratitude to those
of you who have shared your knowledge, and sometimes wit, with me :<).
After going through plot(), I have arrived at MAP_IMAGE(). Some stuff
is straight forward and I know that many of you know this stuff like
the back of your hands; so, can someone please explain a little more in
detail what these two arguments to map_image() are? The statements
below are straight out of the IDL manual.
Startx:
A named variable that, upon return, contains the X coordinate position
where the left edge of the image should be placed on the screen.
Starty:
A named variable that, upon return, contains the Y coordinate position
where the left edge of the image should be placed on the screen.
Here is what I understand so far:
startx, seen in a cartesian system ought to zero: the left side of the
image.
I don't get this, 'upon return' part, return from where? This may be
funny to some and it probably is, but one has to start somewhere. Now
this Y left and right part has got me. So there you go, my
understanding in a nutshell. I get the feeling that I ought to
understand more about my screen than I currently do.
Sincerely,
Sheldon
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