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[ferret_users] index question

Hi All,

I have two data sets containing
lon,lat, and data for some variable. All three fields have
i=1:35,j=1,k=1,l=1:9200 dimensions.

I first find along i-axis maximum of variance between the two datasets:

let dd2 = (data[d=1]-data[d=2])^2
let dd2_imx=dd2[i=@max]
let zero_at_imx=dd2-dd2_imx
let i_of_imx = zero_at_imx[i=@loc:0]

Now I would like to get
lon(i_of_imx), lat(i_of_imx) for non-zero dd2_imx.

It should be straight forward but it is not transparent to me.

Please help.


--- Peng

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