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Topic: match matrix to closest values
Replies: 5   Last Post: Jun 16, 2013 3:34 AM

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dpb

Posts: 8,231
Registered: 6/7/07
Re: match matrix to closest values
Posted: Jun 10, 2013 3:46 PM
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On 6/10/2013 2:24 PM, Bruno Luong wrote:
...

> Back to the question, there is no need to compare all the pairs. This
> should do:
>
> h = unique(haystack(:))
> val = interp1(h,h,needle,'nearest')

...

Yeah, good catch, Bruno. OP might want to add

val = interp1(h,h,needle,'nearest','extrap')

to pick end points if input runs off ends rather than return NaN but
that'll be an implementation/use choice...

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