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Re: Binary (0s and 1s) output [message #41776]

Tue, 07 December 2004 21:57

marc schellens[1]
Messages: 183
Registered: January 2000

Senior Member

josegomez@gmx.net wrote:
> Hi!
> I'm very new to IDL, and I'm trying to convert 5 integers into a series
> of 40 logical (0/1) values. I have done this in fortran in the past
> using an internal write, and then converting each element in the output
> string into a 0 or 1. Given my limited knowledge of IDL, I tried to use
> print with a format specifier, as follows:
> IDL> print,format='(2B8.8)',0,255
> % Unexpected text in format.
> "(2B8.8)"
> ^
> % Execution halted at: $MAIN$
>
> According to my notes, the B format is there and can be used (this is
> IDL 6.0).
>
> The other problem is how to convert the (potentially!) resulting test
> string into an array of integers.

I think this printing/reading is quite ugly.

Better do something like:

bytIn = [ your byte value array]

nIn = n_elements( bytIn)

boolOut = bytarr( 8, nIn)

for bit=0,7 do begin

boolOut[ bit, *] = (bytIn and 2^bit) gt 0

endfor

boolOut[ bitnumber, inputIntegerNumber] contains now your result

HDH,
marc

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[Message index]

		Re: Binary (0s and 1s) output By: marc schellens[1] on Tue, 07 December 2004 21:57
		Re: Binary (0s and 1s) output By: josegomez on Tue, 07 December 2004 09:15
		Re: Binary (0s and 1s) output By: Benjamin Hornberger on Tue, 07 December 2004 08:20
		Re: Binary (0s and 1s) output By: David Fanning on Tue, 07 December 2004 08:21
		Re: Binary (0s and 1s) output By: David Fanning on Tue, 07 December 2004 08:20

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