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Re: IDL 8 image function [message #74780 is a reply to message #74779]

Wed, 02 February 2011 07:30

sh
Messages: 26
Registered: April 2010

Junior Member

On Feb 2, 2:31 pm, sh <sebastian.h...@gmail.com> wrote:
> On Feb 2, 12:44 pm, sh <sebastian.h...@gmail.com> wrote:
>
>
>
>> On Feb 2, 11:44 am, David Forcadell <david...@gmail.com> wrote:
>
>>> On Feb 2, 11:02 am, sh <sebastian.h...@gmail.com> wrote:
>
>>>> Hi,
>
>>>> Is there any option/keyword to turn of the scaling between 0-255? I
>>>> have already scaled by values e.g. between 0 and 100 because I only
>>>> want to use this colors in the colortable, and not all of them!
>>>> Thanks!
>
>>>> Sebastian
>
>>> I am not sure that i understand you question, but perhaps you want
>>> this :
>
>>> result=BYTSCL( MAT_IN , TOP=100)
>
>> Yes I do it exactly like this, but image() rescales it again between 0
>> and 255. How to turn this off?
>
> Another question, is there any possiblity to set a background value
> like NaN in iimage?
>
> All NaN values are transformed to 0 after bytscl?

Ok I think I found the problem. Within idlitvisimage__define.pro in
line 1801 there is the bytscl, without the possibility to turn it off.

Would be nice to specify the top and bottom or even turn it off if the
data is already scaled.

Then the next think is the colorbar which didn't match when I update
line 1801 with top and bottom.

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[Message index]

		Re: IDL 8 image function By: penteado on Wed, 02 February 2011 11:20
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 09:35
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 09:00
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 08:51
		Re: IDL 8 image function By: Paul Van Delst[1] on Wed, 02 February 2011 08:35
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 08:21
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 08:11
		Re: IDL 8 image function By: penteado on Wed, 02 February 2011 07:51
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 07:43
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 07:30
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 05:31
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 03:44
		Re: IDL 8 image function By: David Forcadell on Wed, 02 February 2011 02:44
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28

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