comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » STRETCH: A bug?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: STRETCH: A bug? [message #38706 is a reply to message #38633]

Sun, 21 March 2004 15:45

timrobishaw
Messages: 16
Registered: June 2003

Junior Member

Hi David,

Thanks; I wasn't sure if "non-optimal algorithm" was equivalent to
"bug". Oh, don't forget to add the TOP keyword set to !d.table_size-1
in the bytscl call! One thing I had taken for granted until I looked
at the code is that STRETCH can be used to reverse the color table
quite easily:

stretch, !d.table_size-1, 0

Thanks again. -Tim.

David Fanning <david@dfanning.com> wrote in message news:<MPG.1ac76b071a389748989705@news.frii.com>...
> Tim Robishaw writes:
>
>> So I've been thinking too much about color tables. I took a look at
>> IDL's STRETCH just to make sure it does as it advertises, but I'm
>> mostly sure it doesn't. I'm not so sure I want to run around saying
>> it's a bug, so I thought I'd run it by you guys for opinions.
>
> I'm not sure I would go so far as to call it a bug.
> Maybe a non-optimal algorithm.
>
> But your method works, and it is much faster than the
> inelegant way I was doing this in one of my programs,
> so I've adopted it. It's not going to make you famous,
> of course, but maybe it's vindication for spending all
> those long hours working it out. :-)
>
> Cheers,
>
> David

Report message to a moderator

[Message index]

		STRETCH: A bug? By: timrobishaw on Fri, 19 March 2004 02:20
		Re: STRETCH: A bug? By: timrobishaw on Sun, 21 March 2004 15:45
		Re: STRETCH: A bug? By: David Fanning on Sun, 21 March 2004 08:04

Previous Topic:	Re: checking if file is dos textfile or unix textfile ?
Next Topic:	Light and images in a IDLgrView

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Dec 03 00:09:16 PST 2025

Total time taken to generate the page: 0.87728 seconds