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Re: turn a string value into variable name [message #63122 is a reply to message #63041]

Wed, 29 October 2008 08:09

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

loebasboy writes:

> To know if my code is good coding I'll explain myself why I want to
> use this type of coding.
>
> I want to write function to read data out of a HDF5 file with a
> certain structure. The HDF5 file consists of a digital aerial image
> with callibration information per band and such. What I wanted to do
> is that I want to read in the central wavelength of a band, analyse it
> and define the name of that band so that I can write the data of the
> band in a variable with the right name of that band. Lets say that the
> central wavelength of this band is 752 nm, I would like to write the
> information of this band in the variable "NIR". So I first read in the
> central wavelength of a certain band, compare it with a reference
> value (depends on the sensor), and then write the information of the
> band in the right named variable. In this way I could do analyses with
> logical named variables...for instance, the calculation of the NDVI
> simply becomes (NIR-R)/(NIR+R) in the code.

Well, I think I'll just stand behind my statement. :-)

Cheers,

David

P.S. Wouldn't just using simple variables make your program easier
to understand!? That's sort of the purpose of variables, to
stand in for the real thing.

--
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.")

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[Message index]

		turn a string value into variable name By: Nick[2] on Thu, 23 October 2008 15:30
		Re: turn a string value into variable name By: David Fanning on Wed, 29 October 2008 08:09
		Re: turn a string value into variable name By: loebasboy on Wed, 29 October 2008 08:29
		Re: turn a string value into variable name By: laura.hike on Thu, 01 June 2017 15:48
		Re: turn a string value into variable name By: Markus Schmassmann on Fri, 02 June 2017 02:59
		Re: turn a string value into variable name By: loebasboy on Wed, 29 October 2008 07:55
		Re: turn a string value into variable name By: David Fanning on Wed, 29 October 2008 06:34
		Re: turn a string value into variable name By: Vince Hradil on Wed, 29 October 2008 08:30

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