comp.lang.idl-pvwave archive: archive » Re: Array multiplication: implicit loop query

Home » Public Forums » archive » Re: Array multiplication: implicit loop query

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

Re: Array multiplication: implicit loop query [message #26185]

Fri, 10 August 2001 08:09

Richard Younger
Messages: 43
Registered: November 2000

Member

"Bill B." wrote:
>
> george@apg.ph.ucl.ac.uk (george Millward) wrote in message

>> It
>> would seem that, to get this to work I need to make
>> Pres=fltarr(30,91,40).
>
> Yes.
>
> IDL> a = indgen(20,20)
> IDL> b = indgen(20)
> IDL> c = b * a
> IDL> help, c
> C INT = Array[20]
>
> I believe you need to REPLICATE 'Pres' as needed.
>
> -Bill B.

I've been converted to REBIN, myself.
(see the group archives for the dimensional juggling tutorial by JD
Smith this past spring)

IDL> Pres_expan = REBIN(Pres, 30, 91, 40)
IDL> help, Pres_expan
PRES_EXPAN FLOAT = Array[30, 91, 40]

This gives you the correct dimensions and avoids loops. You can even
resize inline if you dislike having the extra variable around:

DEN_H = MMR_H * REBIN(Pres, 30, 91, 40) * RMT / $
( atomic_mass_H * Gas_constant * TN )

Good luck,

Rich Younger

Report message to a moderator

[Message index]

		Re: Array multiplication: implicit loop query By: Richard Younger on Fri, 10 August 2001 08:09
		Re: Array multiplication: implicit loop query By: Kenneth P. Bowman on Fri, 10 August 2001 05:58
		Re: Array multiplication: implicit loop query By: billb on Fri, 10 August 2001 05:53
		Re: Array multiplication: implicit loop query By: John-David T. Smith on Mon, 13 August 2001 07:43
		Re: Array multiplication: implicit loop query By: george on Mon, 13 August 2001 02:59

Previous Topic:	Re: Log IDLgrAxis
Next Topic:	Discussion on global variables in IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 18:56:51 PDT 2025

Total time taken to generate the page: 0.00578 seconds