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Re: Plot into an array [message #25622 is a reply to message #25592]

Fri, 29 June 2001 06:16

david[2]
Messages: 100
Registered: June 2001

Senior Member

Dominik Paul writes:

> does somebody know, how I can plot a function into an array, not into a
> window? Or can I get the array of the image of a window for saving as a jpeg
> or gif?

Write into a pixmap window (a window in memory):

Window, /Pixmap, /Free
Plot, myfunction
array = TVRD() ; or TVRD(True=1) on 24-bit display

Or, write into the Z-graphic buffer, if you want
to be assured of having a 2D array:

thisDevice = !D.Name
Set_Plot, 'Z'
Plot, myfunction
array = TVRD()
Set_Plot, thisDevice

> Or can I get the array of the image of a window for saving as a jpeg
> or gif?

If you don't want to worry about what kind
of device you are on and what keyword to use
with TVRD, and you want to write JPEG, TIFF,
PNG, GIF, etc files directly (you write JPEG
and GIF files in two completely different ways,
depending upon the type of device you are using),
get ahold of my TVRead program. It takes
care of all these details for you:

http://www.dfanning.com/programs/tvread.pro

Then you can use either a pixmap or the Z-buffer and
just do something like this:

array = TVRead(/JPEG)

To read the image from the display and create the
output file directly.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Plot into an array By: david[2] on Tue, 03 July 2001 18:33
		Re: Plot into an array By: Richard French on Tue, 03 July 2001 17:13
		Re: Plot into an array By: Dennis Boccippio on Tue, 03 July 2001 08:45
		Re: Plot into an array By: Dennis Boccippio on Tue, 03 July 2001 08:42
		Re: Plot into an array By: david[2] on Fri, 29 June 2001 06:16

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