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Re: Can someone please explain this to me, I am stumped (or stupid)... [message #47534]

Sun, 12 February 2006 19:35

David Green
Messages: 7
Registered: July 2005

Junior Member

ahh, thankyou for the explaination. My code is now working :)

Dave.

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Re: Can someone please explain this to me, I am stumped (or stupid)... [message #47535 is a reply to message #47534]

Sun, 12 February 2006 19:18

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Check this out:
>
> IDL> a=1.9999999
> IDL> print, a
> 2.00000
> IDL> print, findgen(a)
> 0.000000

Whoops! I accidentally left out the last example:

IDL> print, fix(a)
1

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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Re: Can someone please explain this to me, I am stumped (or stupid)... [message #47536 is a reply to message #47535]

Sun, 12 February 2006 19:15

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Green writes:

> This seems to be the cause of the problem, not sure why this is
> happening though
>
> IDL> print, nph[jj]
> 2.00000
> IDL> print, fix(nph[jj])
> 1
> IDL>

When is the last time you read the Sky is Falling article?

http://www.dfanning.com/math_tips/sky_is_falling.html

Check this out:

IDL> a=1.9999999
IDL> print, a
2.00000
IDL> print, findgen(a)
0.000000

Computers, man! Who needs 'em! :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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Re: Can someone please explain this to me, I am stumped (or stupid)... [message #47537 is a reply to message #47536]

Sun, 12 February 2006 18:20

David Green
Messages: 7
Registered: July 2005

Junior Member

This seems to be the cause of the problem, not sure why this is
happening though

IDL> print, nph[jj]
2.00000
IDL> print, fix(nph[jj])
1
IDL>

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