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A Lookup-table-ish problem [message #842]

Thu, 29 April 1993 10:33

ian
Messages: 26
Registered: February 1992

Junior Member

A problem for everyone to ponder:

I have some water vapor image data that I'm converting to elevation. To do
this, I have what amounts to two look-up tables of values. In other words, I
have an array of water vapor values and an array of corresponding elevation
values. I wish to take my water vapor image and make it into an elevation
image. I hacked a routine to do this (using WHERE()), but it takes forever
to run (on a 512x614 image) as it has several layers of loops.

Is there something in IDL (v 3.0.0) or its userlib that does this? Anything
like efficiently?

|-Ian Novack (Particle Man)----------------------------ian@gomez.jpl.nasa.gov-|
| "I am trying to fill a silent moment with Jet Propulsion Lab |
| non-relevant conversation." -- Lt. Cmdr. Data Pasadena, CA |
|-Disclaimer: Had this been an actual opinion, it would still be mine.--------|

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A Lookup-table-ish problem

By: ian on Thu, 29 April 1993 10:33

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