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Re: Please explain this if you can: (short) [message #3211 is a reply to message #3210]

Mon, 05 December 1994 04:58

greec
Messages: 2
Registered: November 1994

Junior Member

In article <Pine.SOL.3.91.941202142557.14825A-100000@chroma> Russ Welti <rwelti@chroma.mbt.washington.edu> writes:
> Try this:
>
> IDL> a=bytarr(20)
> IDL> a(3)=244
> IDL> print,min(a)
> 0
> IDL> print,max(a)
> 244
> IDL> print,abs(max(a)-min(a))
> 12
> IDL> print,max(a)-min(a)
> 244
>

What is happening is that the bytes are being treated as signed
numbers. When you execute the 'print,abs(max(a)-min(a))'.
You get the same thing happening when you do
WAVE> print, sqrt((max(a)-min(a))*(max(a)-min(a)))
12.0000
Don't know if this is any help at all. But it does explain
what is happening.

Chris
greec@essex.ac.uk

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[Message index]

		Re: Please explain this if you can: (short) By: pjclinch on Mon, 05 December 1994 05:46
		Re: Please explain this if you can: (short) By: greec on Mon, 05 December 1994 04:58
		Re: Please explain this if you can: (short) By: sjt on Mon, 05 December 1994 02:36

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