| Re: ENVI header files in IDL [message #58948 is a reply to message #58947] |
Wed, 27 February 2008 09:29   |
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Bob[3]
Messages: 60
Registered: December 2006
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On Feb 27, 10:39 am, David Fanning <n...@dfanning.com> wrote:
> Raghu writes:
>> In IDL, i'm using filesearch function to read through files of certain
>> types.
>> Since an envi file has no specific extension, i'm not able to figure
>> out how to sort out the files.
>> Here's an example:
>
>> Say i have 2 images in ENVI format. It would look like IMAGE1,
>> IMAGE1.hdr,IMAGE2, IMAGE2.hdr.
>> As you can see, its only the header file which has the extension. When
>> i use the filesearch(image*), i am not
>> able to ignore the header files. These header files are not to be
>> processed.
>
>> Any ideas of how to choose only the images and not the header files,
>> as in this case ?
>> I guess i could convert the files to IMG so that they have an
>> extension, but there must be an easier way.
>
> Are you feeling confident this morning? Charged up?
> If so, you may want to try to wrap your head around
> regular expressions. Here is where I would go for a
> start:
>
> http://www.ittvis.com/codebank/search.asp?FID=311
>
> This points you to Mike Galloy's excellent article on
> the subject. I've been studying the damn things for years
> without making the slightest bit of progress, but maybe
> you will have more luck.
>
> Failing that, I think a WHERE statement to locate the
> parts of the file search array you want to keep
> (or eliminate) wouldn't be totally out of place. :-)
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")- Hide quoted text -
>
> - Show quoted text -
Or, if you know you only have at max image0 thru image9:
result = FILE_SEARCH('image?')
Or if your known max is image99:
result = FILE_SEARCH('{image?,image??}')
(that is if you're not feeling up to regular expressions)
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