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Re: alternative to execute [message #47336 is a reply to message #47205]

Thu, 02 February 2006 10:46

greg michael
Messages: 163
Registered: January 2006

Senior Member

Hi Bob,

> I see. The user defined function (udf) will be applied only to a subset of the
> overall data, then the user will scroll around necessitating that the function
> be re-applied (is that right). So, it is not possible to perform the operation
> on the entire spectral image cube? (memory requirements?).

Exactly. I want to avoid processing the entire image for speed.

For the moment, I'm prototyping it with execute (which works well), but
I'm thinking now to attempt an arithmetic interpreter. I imagine some
nice recursive routine with regex string cutting (I dread that part!)
and cases for each operator could do it. I'm not keen to use general
functions for the loss of flexibility, although you're right - if well
chosen, they could probably cover most cases.

As for C - haven't touched that in years - wouldn't that need some kind
of self-compiling code? Sounds intimidating to me!

thanks again for your comments - much appreciated.
Greg

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[Message index]

		alternative to execute By: greg michael on Tue, 31 January 2006 10:43
		Re: alternative to execute By: greg michael on Thu, 02 February 2006 03:58
		Re: alternative to execute By: news.qwest.net on Thu, 02 February 2006 09:28
		Re: alternative to execute By: news.qwest.net on Wed, 01 February 2006 15:03
		Re: alternative to execute By: greg michael on Wed, 01 February 2006 14:38
		Re: alternative to execute By: JD Smith on Wed, 01 February 2006 13:17
		Re: alternative to execute By: greg michael on Thu, 02 February 2006 10:46

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