| Re: CLUSTER of atmospheric trajectories [message #75528] |
Tue, 22 March 2011 00:56 |
Chicho
Messages: 3
Registered: March 2011
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Junior Member |
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On 18 mar, 14:15, David Fanning <n...@idlcoyote.com> wrote:
> Chicho writes:
>> We are working with atmospheric trajectories at 500mm height. We have
>> 1500 trajectories (Time, latitute and longitude) and we would like to
>> use the cluster analysis to evaluate the centroides of that. We know
>> the CLUST_WTS function but I don't understand what is the format of
>> the input file. Could anyone help us?
>
> I've never done cluster analysis, but it looks to
> me like you have three variables and 1500 observations.
> So, you would create a 3x1500 array as input:
>
> array = Transpose([[time], [lon], [lat]])
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.idlcoyote.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Thanks David, I have used this form and I only get three variables for
every cluster. But I need three variables for each time and for each
cluster. Do you have any other idea? Thanks in advance,
Regards,
Mar
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| Re: CLUSTER of atmospheric trajectories [message #75542 is a reply to message #75528] |
Fri, 18 March 2011 06:15  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Chicho writes:
> We are working with atmospheric trajectories at 500mm height. We have
> 1500 trajectories (Time, latitute and longitude) and we would like to
> use the cluster analysis to evaluate the centroides of that. We know
> the CLUST_WTS function but I don't understand what is the format of
> the input file. Could anyone help us?
I've never done cluster analysis, but it looks to
me like you have three variables and 1500 observations.
So, you would create a 3x1500 array as input:
array = Transpose([[time], [lon], [lat]])
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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