Re: Nearest neighbor interpolation.

[Francesco Potortì]

>> I can suggest to reduce the two for-loops to one to make it faster:
>
>Forget the single for-loop, it's even easier than that, you only need:
>
>b(1:2:end,1:2:end) = a;
>
>Period; no for-loops, no interpolation, life it's sometimes easier than 
>it looks like...

It would be good programming practice to initialize b beforehand:

b = zeros (size (a));

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