Dear Ben,
I was searching for the same problem. Thank you very much, it helped me a lot
and I will use it quite often!
In addition to the problem given by tintin_et_milou. I have to compare a two
pairs of vectors.
I.e. I have two datasets each with latitude and longitude (which defines the
geographical position of data points.)
As you might imagine, it is meaningful to take into account both latitude and
longitude, when searching for the nearest data point from the otehr dataset.
Do you have any idea how to do this efficiently (actually I used loops ;-( ?
Best regards
Daniel
Ben Bolker schrieb:
>
> distfun <- function(x1,x2) { (x1-x2)^2 }
>
> outer(m1[,1],y,distfun)
> cheers
> Ben
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