comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » HASH question

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

Re: HASH question [message #75454 is a reply to message #75367]

Mon, 07 March 2011 13:02

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Mar 7, 5:32 pm, Paolo <pgri...@gmail.com> wrote:
> Single stars can easily be located with where:
>
> ind=where(allstars.starID EQ 'Delta Pavonis',count)
> if count EQ 1 then print,'The magnitude of '+allstars[ind].starID+' is
> '+strtrim(allstars[ind].magnitude,2)

I would not call that "easily". The two problems are mentioned in the
first question: "but I don't a priori know how many stars I have, and
to find a particular star I'd have to search on the ID element."

The search is awkward and not efficient, the arrays cannot have
elements dynamically added or removed, and they would not avoid
repetitions (elements with the same key).

Report message to a moderator

[Message index]

		HASH question By: Gray on Sat, 05 March 2011 05:41
		Re: HASH question By: penteado on Tue, 08 March 2011 10:15
		Re: HASH question By: pgrigis on Tue, 08 March 2011 10:12
		Re: HASH question By: penteado on Tue, 08 March 2011 07:56
		Re: HASH question By: David Fanning on Tue, 08 March 2011 07:11
		Re: HASH question By: pgrigis on Tue, 08 March 2011 07:05
		Re: HASH question By: Gray on Tue, 08 March 2011 04:23
		Re: HASH question By: chris_torrence@NOSPAM on Mon, 07 March 2011 13:38
		Re: HASH question By: penteado on Mon, 07 March 2011 13:05
		Re: HASH question By: penteado on Mon, 07 March 2011 13:02
		Re: HASH question By: chris_torrence@NOSPAM on Mon, 07 March 2011 13:00
		Re: HASH question By: pgrigis on Mon, 07 March 2011 12:32
		Re: HASH question By: Jeremy Bailin on Mon, 07 March 2011 11:15

Previous Topic:	IDL 8.0 image() scaling
Next Topic:	Floating illegal operand error when reach end of for loop

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 20:13:34 PDT 2025

Total time taken to generate the page: 0.00376 seconds