SAXO Documentation Assistant: Overview

ToBeReviewed/LECTURE/

binary.pro

Returns the binary representation of a number of any numerical type.

binary

result = binary(number)

Return value

Byte array with binary representation of numbers.

Parameters

number in required

scalar or array of numbers (any numerical type)

Examples


   Binary representation of 11b:
   IDL> print, binary(11b)
     0 0 0 0 1 0 1 1

   Binary representation of pi (x86: Little-endian IEEE representation):
   IDL> print, format='(z9.8,5x,4(1x,8i1))', long(!pi,0), binary(!pi)
      40490fdb      01000000 01001001 00001111 11011011 (x86 Linux)
      0fdb4149      00001111 11011011 01000001 01001001 (Alpha OpenVMS)
   IDL> print, format='(8(1x,8i0))', binary(!dpi)
      01000000 00001001 00100001 11111011 01010100 01000100 00101101 00011000

   Some first tests before type double was added:
   IDL> print, format='(2a6,4x,2z9.8,4x,8z3.2)', $
       !version.arch, !version.os, long(!dpi,0,2), byte(!dpi,0,8)
       x86 linux     54442d18 400921fb     18 2d 44 54 fb 21 09 40
     sparc sunos     400921fb 54442d18     40 09 21 fb 54 44 2d 18
     alpha   vms     0fda4149 68c0a221     49 41 da 0f 21 a2 c0 68
     (Beginning with IDL 5.1, Alpha VMS uses IEEE representation as well.)

Version history

Version

$Id: binary.pro 371 2008-08-07 09:32:02Z pinsard $

History

19 Dec 1997 Originally a news posting by David Fanning. (Re: bits from bytes) 20 Dec 1997 "Complete" rewrite: eliminate loops. 22 Dec 1997 Bit shift instead of exponentiation, return byte array, handle input arrays. Think about double and complex types. 22 Sep 1998 Complete rewrite: reduce every numerical type to single bytes. Check that big and little endian machines return exactly the same results (if IEEE). 7 May 2003 Added newish data types, unsigned and long64. BT

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