comp.lang.idl-pvwave archive: archive » Re: replace array's elemets

Home » Public Forums » archive » Re: replace array's elemets

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

Re: replace array's elemets [message #35170 is a reply to message #35165]

Fri, 16 May 2003 15:19

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Reimar Bauer wrote:
>
> Roberto wrote:
>
>> Hi
>> I have a 100x100 array.
>> How can I replace an element if is different from 0?
>> I would replace all elements different from 0 with 1.
>> thank and sorry for the trouble.
>> Roberto
>
> Dear Roberto
>
> I suggest something like this
>
> example data:
> x=indgen(100,100)
>
> result:
> result=x<1

That doesn't do the right thing with negative numbers. "result=x ne 0"
is the right choice. More generally,

x[where(x ne 0)] = 1

has the advantage of being more easily generalized to the case of more
complicated search conditions, and different replacement values.
However, it will produce an error message if no replacements are needed.

Report message to a moderator

[Message index]

		Re: replace array's elemets By: James Kuyper on Sat, 17 May 2003 15:15
		Re: replace array's elemets By: R.Bauer on Sat, 17 May 2003 04:13
		Re: replace array's elemets By: James Kuyper on Fri, 16 May 2003 15:19
		Re: replace array's elemets By: R.Bauer on Fri, 16 May 2003 13:45
		Re: replace array's elemets By: Liam E. Gumley on Fri, 16 May 2003 12:04
		Re: replace array's elemets By: Chris[1] on Fri, 16 May 2003 09:13
		Re: replace array's elemets By: btt on Fri, 16 May 2003 09:00

Previous Topic:	Re: plotting from high values to low values
Next Topic:	read pixels

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 12:04:12 PDT 2025

Total time taken to generate the page: 1.20187 seconds