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Re: Finding the index of the median [message #7349 is a reply to message #7268]

Tue, 29 October 1996 00:00

daffer
Messages: 9
Registered: October 1996

Junior Member

In article <32769981.73B9@cassini.lpl.arizona.edu>,
Dean Schulze <schulze@cassini.lpl.arizona.edu> wrote:
> Joseph M. Zawodny wrote:
>>
>> Dean Schulze wrote:
>>>
>>> David Fanning wrote:
>>>
>>>> Be aware that there can be multiple locations in your
>>>> array that are equal to the median value. The index that
>>>> is returned by the WHERE function will be an array of
>>>> all of those values.
>>>
>>> That is exactly why the WHERE() function won't work.
>>> I need to know which one of those locations is returned
>>> by the MEDIAN() function.
>
>> MEDIAN does not return an element or LOCATION, it returns a
>> VALUE which may be held by one or more elements.
>
> Sorry, careless writing on my part. I should have said
> "I need to know the location of the value that is returned
> by MEDIAN()".
>
>

( snipped to save space )

>
> An unusual situation, but one that MEDIAN() and WHERE() don't
> seem to work with.
>
>
> Dean Schulze
>

Dean
Implement your own median

let data = your data
noise = associated noise array
n = n_elements( data )
s = sort(data )
median = data(s(n/2))
associated_noise_value = noise(s(n/2))
This is pretty much what median does.

I think that does it.
Let me know if I'm wrong.
WHD
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[Message index]

		Finding the index of the median By: Dean Schulze on Fri, 25 October 1996 00:00
		Re: Finding the index of the median By: Dean Schulze on Wed, 30 October 1996 00:00
		Re: Finding the index of the median By: haferman on Wed, 30 October 1996 00:00
		Re: Finding the index of the median By: Joseph M Zawodny on Wed, 30 October 1996 00:00
		Re: Finding the index of the median By: meron on Wed, 30 October 1996 00:00
		Re: Finding the index of the median By: David Foster on Tue, 29 October 1996 00:00
		Re: Finding the index of the median By: Dean Schulze on Tue, 29 October 1996 00:00
		Re: Finding the index of the median By: daffer on Tue, 29 October 1996 00:00
		Re: Finding the index of the median By: davidf on Tue, 29 October 1996 00:00

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