comp.lang.idl-pvwave archive: archive » Floating underflow in a plot

Home » Public Forums » archive » Floating underflow in a plot

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

Re: Floating underflow in a plot [message #90785 is a reply to message #90779]

Wed, 15 April 2015 12:04

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Wednesday, April 15, 2015 at 12:58:16 PM UTC-5, miguelfigue...@gmail.com wrote:
>> Seems to be a very strange error. I can't explain it. However, are you
>> really sure, that the floating underflow error leads to missing
>> points, as you say in the answer to Craig's post?
>
> The underflow problem was not the cause of the error
>
> I found the problem : the subscript l_n for the array "resultat" can be very high so I needed this variable to have a double precision.
>
> l_n=double(l_n) fixed the problem.
>
> Thank you for your help ;)
>
> Miguel

Ah, interesting. You don't really want to be using a double for something that's fundamentally an integer. But I see that you're actually using a short integer -- any integer that you don't know a priori will never go about 32000 should always be defined as a long:

l_n=0L

And anything that is really a floating-point number should not be declared as an integer:

To=220.0

-Jeremy.

Report message to a moderator

[Message index]

		Floating underflow in a plot By: Miguel on Tue, 14 April 2015 00:50
		Re: Floating underflow in a plot By: Craig Markwardt on Tue, 14 April 2015 04:32
		Re: Floating underflow in a plot By: Miguel on Tue, 14 April 2015 08:53
		Re: Floating underflow in a plot By: Heinz Stege on Tue, 14 April 2015 04:36
		Re: Floating underflow in a plot By: Miguel on Tue, 14 April 2015 08:55
		Re: Floating underflow in a plot By: Heinz Stege on Tue, 14 April 2015 11:28
		Re: Floating underflow in a plot By: Miguel on Wed, 15 April 2015 10:58
		Re: Floating underflow in a plot By: Jeremy Bailin on Wed, 15 April 2015 12:04
		Re: Floating underflow in a plot By: Lajos Foldy on Tue, 14 April 2015 13:04

Previous Topic:	Regridding NCEP Data
Next Topic:	FG-arithmetic error and moving objects

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:56:54 PDT 2025

Total time taken to generate the page: 0.00284 seconds