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Map array values relative to another array

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Mathew Thomas
Mathew Thomas 2017-4-25
评论： Mathew Thomas 2017-4-25
I have an array of xy coordinates, a = [4000,3000; 4200, 3100; 4014, 2900]; Array 'a' has been translated to lat lon values b = [72.1321, -32.789; 73.1879, -31.8987; 72.89109, -32.8796];
Now I have another set of xy coordinates, a2 = [3600,2900; 4000, 2100; 4200, 3200]; How can I get 'b2' based on interpolating values in 'a','b' and 'a2'?
Thanks, Mathew

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采纳的回答

Honglei Chen
Honglei Chen 2017-4-25
Maybe something like this?
b2 = reshape(interp1(a(:),b(:),a2(:),'linear','extrap'),size(a2))
HTH

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2017-4-25
aa = sort(a);
bb = sort(b);
F = {griddedInterpolant(aa(:,1),bb(:,1)),griddedInterpolant(aa(:,2),bb(:,2))};
out = cell2mat(cellfun(@(f,x)f(x),F,num2cell(a2,1),'un',0));
  1 个评论
Mathew Thomas
Mathew Thomas 2017-4-25
Both methods work, just that I need to preserve the order as is without sorting.

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