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Re: Reading individual bits of MODIS BRDF quality files [message #68091 is a reply to message #68072]

Fri, 18 September 2009 06:25

pgrigis
Messages: 436
Registered: September 2007

Senior Member

On Sep 18, 5:54 am, emitchard <emitch...@googlemail.com> wrote:
[skip]

> Is there a function in IDL that can read individual bits, or any other
> clever way to produce an array of 1s and 0s from a 32-bit integer?

For the record (in case somebody needs that):

IDL> x=2LL^45+2LL^35+2LL^32+2LL^31+2LL^25+2LL^15+2LL^5-1 & print,x
35225207865375

;get only 32 bits
IDL> a=string(ulong(x),format='(B)') & print,a
10000010000000001000000000011111

;get all bits
IDL> a=string(x,format='(B)') & print,a
1000000000100110000010000000001000000000011111

Ciao,
Paolo

>
> Many thanks for your help,
>
> Edward Mitchard

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[Message index]

		Re: Reading individual bits of MODIS BRDF quality files By: wita on Mon, 21 September 2009 01:38
		Re: Reading individual bits of MODIS BRDF quality files By: pgrigis on Fri, 18 September 2009 06:25
		Re: Reading individual bits of MODIS BRDF quality files By: emitchard on Fri, 18 September 2009 05:05
		Re: Reading individual bits of MODIS BRDF quality files By: Wout De Nolf on Fri, 18 September 2009 05:05

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