comp.lang.idl-pvwave archive: archive » sin() function in IDL 4.0.1

Home » Public Forums » archive » sin() function in IDL 4.0.1

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

Re: sin() function in IDL 4.0.1 [message #5848 is a reply to message #5773]

Fri, 16 February 1996 00:00

chs11
Messages: 14
Registered: October 1995

Junior Member

In article <311F6435.143A@eso.org>, Miska Le Louarn <lelouarn@eso.org> wrote:
> Hello,
> I just found an interesting behaviour of the sine function:
> when I ask IDL (4.0.1) to calculate sin(pi) here is what I get:
>
> IDL> print,sin(!Dpi)
> 1.2246064e-16 ; This should be 0.0000... (?)

If you want to see something even more interesting, try this...

IDL> plot,sin(dindgen(1000)*!Dpi)

or even worse...

IDL> plot,sin(dindgen(1000)*1e20*!Dpi)

This is quite troublesome.

Carl

Report message to a moderator

[Message index]

		sin() function in IDL 4.0.1 By: Miska Le Louarn on Mon, 12 February 1996 00:00
		Re: sin() function in IDL 4.0.1 By: chs11 on Fri, 16 February 1996 00:00

Previous Topic:	Help with WIDGET_TEXT (non-) events
Next Topic:	Molecular Modelling really possible with pv-wave?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 00:41:48 PDT 2025

Total time taken to generate the page: 0.64348 seconds