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Re: Minimum between two arrays; no, not just Min(A-B) [message #55851]

Wed, 19 September 2007 03:55

leatherback
Messages: 15
Registered: November 2005

Junior Member

Hi JD,

This worked like a charm! Didn't know the value_locate function.

thanks!

J.

> If they are in sorted order, you can use VALUE_LOCATE, which is happy
> to search for the location of many dates within many satellite
> timestamps, all at once. Then select which ever of the two is closer,
> like so:
>
> IDL> nv=100
> IDL> obs=randomu(sd,nv) & sat=randomu(sd,nv) & sat=sat[sort(sat)]
> IDL> v=value_locate(sat,obs)
> IDL> m=min(abs(sat[[1#v,1#v+1]]-rebin(1#obs,2,nv)),pos,DIMENSION= 1)
> IDL> v= nv-1 < (v + pos mod 2) > 0
> IDL> print,mean(abs(sat[v]-obs))
>
> JD

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[Message index]

		Re: Minimum between two arrays; no, not just Min(A-B) By: leatherback on Wed, 19 September 2007 03:55
		Re: Minimum between two arrays; no, not just Min(A-B) By: JD Smith on Tue, 18 September 2007 15:53

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