Sampling mutliple data around a specific point

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Si Cla
Si Cla 2017-6-16
编辑： dpb 2017-6-16
I have a large number of xyz data. I need to find the nearest equivalent data points within this data set to some coordinates. I.e. I need to find all the nearest xyz data which "surrounds" each coordinate, and then sample this data cloud. Currently, my code can sample the nearest xyz data point to a coordinate, but not all that surround it.
[nr, nc]=size(field);
for i=1:nr
[~, index]=min(abs(model(:,1)-field(i,1))+(abs(model(:,2)-field(i,2))+(abs(model(:,3)-field(i,3)))));
output(i,:)=model(index,:);
end
Is it as simple as creating another loop, or is there a function that allows me sample a data cloud? I've not found anything that seems appropriate.
Many thanks in advance!

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