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Re: Where problem [message #69670 is a reply to message #35914]

Thu, 04 February 2010 01:59

Foldy Lajos
Messages: 268
Registered: October 2001

Senior Member

On Thu, 4 Feb 2010, Dave_Poreh wrote:

> On Feb 4, 1:33 am, FÖLDY Lajos <fo...@rmki.kfki.hu> wrote:
>> On Thu, 4 Feb 2010, Dave_Poreh wrote:
>>> Folks
>>> I can?t solve this problem. Will somebody tells me what is going on?
>>> x=findgen(100)
>>> y=[30,40,50,80]*1.0
>>> index=where(x eq y)
>>> but every time gives me:
>>>> index=-1
>>> Any help highly appreciated
>>> Cheers
>>> Dave
>>
>> Try 'help, x eq y' and 'print, x eq y'.
>>
>> ('x eq y' is equivalent to '[0.,1.,2.,3.] eq [30.,40.,50.,80.]')
>>
>> regards,
>> lajos
>
> Thanks. What I am trying to do is to extract index of 30,40,50, and
> 80 in the array of x. I mean
> X[index]=30, X[index]=40, and so on.
> What I have to do?
> Cheers
>

IDL> print, value_locate(x,y)
30 40 50 80

regards,
lajos

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[Message index]

		WHERE problems (longish) By: Benjamin Panter on Tue, 22 July 2003 08:23
		Re: Where problem By: d.poreh on Fri, 05 February 2010 04:01
		Re: Where problem By: JJ on Thu, 04 February 2010 08:20
		Re: Where problem By: d.poreh on Thu, 04 February 2010 02:30
		Re: Where problem By: Wout De Nolf on Thu, 04 February 2010 02:26
		Re: Where problem By: Wout De Nolf on Thu, 04 February 2010 02:22
		Re: Where problem By: Foldy Lajos on Thu, 04 February 2010 01:59
		Re: Where problem By: d.poreh on Thu, 04 February 2010 01:47
		Re: Where problem By: Foldy Lajos on Thu, 04 February 2010 01:33

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