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Re: cgmap_gshhs.pro minarea issue [message #86612 is a reply to message #86611] Fri, 22 November 2013 08:46 Go to previous messageGo to previous message
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
David Fanning writes:

>
> Takis.Velissariou@deep-c.org writes:
>
>> I saw the modified code in gmap_gshhs.pro and I think that:
>> magnitude = ISHFT(f, -26) AND 1B
>> should change to:
>> magnitude = ISHFT(f, -26) AND 255B
>
> I think I am doing this correctly:
>
> IDL> print, binary(f)
> 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1
> IDL> print, binary(ishft(f,-26))
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

I've changed my mind. I think you are right about this. :-)

It should be AND 255B.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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