comp.lang.idl-pvwave archive: archive » Re: endless loop problem

Home » Public Forums » archive » Re: endless loop problem

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

Re: endless loop problem [message #68963 is a reply to message #68962]

Sun, 06 December 2009 15:28

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Dec 6, 9:11 pm, Elkunn <wasit.weat...@gmail.com> wrote:
> Hi All,
> I would like to run iterations until a condition is met. But it runs
> non-stop. What is the problem with the following code? The problem is
> L reaches the value 1.2840277, but the loop still loops and gives
> 1.2840277 over and over. How to I stop it when it reaches to
> 1.2840277?
> Thanks
>
> ;E1 = Unit vector, known
> ; Z is known matrix
> REPEAT BEGIN
> C = Z##E1
> L = sqrt(EC[0]+EC[1])
> E1 = EC/L
> print,L
> ;Keep going until nothing is moved.
> ENDREP UNTIL L LT 1.2840277
>

L does not change because you are calculating the same thing over and
over again. L only depends on EC[0] and EC[1], and neither changes
when you go through the loop. So if L does not happen to be
<1.2840277, the loop will never end.

Report message to a moderator

[Message index]

		Re: endless loop problem By: penteado on Sun, 06 December 2009 18:21
		Re: endless loop problem By: Wasit.Weather on Sun, 06 December 2009 17:20
		Re: endless loop problem By: David Fanning on Sun, 06 December 2009 15:52
		Re: endless loop problem By: penteado on Sun, 06 December 2009 15:28

Previous Topic:	Why doesn't IDL know the borders of Kazakhstan?
Next Topic:	ASSOC vs SHMMAP vs POINT_LUNs vs READ_BINARY?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 24 11:35:12 PDT 2025

Total time taken to generate the page: 2.32215 seconds