comp.lang.idl-pvwave archive: archive » Problem with variable declaration

Home » Public Forums » archive » Problem with variable declaration

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Problem with variable declaration [message #70526]

Wed, 21 April 2010 10:24

bala murugan
Messages: 23
Registered: April 2010

Junior Member

Hi guys,

IDL> print,((10^5)/(exp(10)*factorial(5)))

The actual result of the above line is 0.0378332748

But when we run it in IDL we get the result as -0.011755556

What should be done to rectify this?

Thanks,
B

Report message to a moderator

Re: Problem with variable declaration [message #70616 is a reply to message #70526]

Wed, 21 April 2010 11:04

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

pp writes:

> That is a conversion, not a declaration. In the case you mentioned
> above, you can declare as
>
> u=10d0 & x=5d0

Right. And be *sure* you understand the difference. It
matters. :-)

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

Cheers,

David

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

Report message to a moderator

Previous Topic:	Re: Problem with variable declaration
Next Topic:	Declaring large vectors in IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 11:34:24 PDT 2025

Total time taken to generate the page: 0.00551 seconds