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Re: WHERE and pointers [message #33549 is a reply to message #33531]

Wed, 08 January 2003 22:16

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Sheryn Gillin (sheryn.gillin@cmr.uq.edu.au) writes:

> Hoping someone may be able to help. I know the beauty of the WHERE
> function, and the importance of pointers, however, I can't get the two
> to work together. For example...I use the ->GetValue('0000'x,
> '0000'x) to read a value from the DICOM header, and the result returns
> is a PtrHeap, but when I try to loop through this array using WHERE I
> get an error. Any hints?

Presumably the return value is a pointer to an array of
values. The syntax would then be something like this:

indices = Where( *ptr GT 5) ; or whatever

Is this what you are doing?

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@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: WHERE and pointers By: David Fanning on Thu, 09 January 2003 19:45
		Re: WHERE and pointers By: sheryn.gillin on Thu, 09 January 2003 13:53
		Re: WHERE and pointers By: David Fanning on Wed, 08 January 2003 22:16
		Re: WHERE and pointers By: sheryn.gillin on Sun, 12 January 2003 16:23

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