MATLAB: How to find elements in an array based on a search from another array.

arraysfindMATLABmatrix

Imagine that i have two arrays:
 a= [1 1 1 1 5 5 5 5 5 5 8 8;
 1 1 1 3 5 5 5 5 5 8 8 8;
 1 1 3 3 3 5 5 5 8 8 8 8;
 1 3 3 3 3 3 5 8 8 8 8 8;
 4 4 4 9 9 0 3 3 8 8 8 8;
 4 4 4 9 0 0 3 3 3 3 8 8;
 4 4 9 9 0 0 0 0 0 0 1 1;
 4 9 9 9 0 0 0 0 0 0 1 1;
 9 9 9 9 9 0 0 0 7 7 7 7]
 b = [4 5 7]
I want ans like this :
 ans = 
 0 0 0 0 1 1 1 1 1 1 0 0 
 0 0 0 0 1 1 1 1 1 0 0 0 
 0 0 0 0 0 1 1 1 0 0 0 0 
 0 0 0 0 0 0 1 0 0 0 0 0 
 1 1 1 0 0 0 0 0 0 0 0 0 
 1 1 1 0 0 0 0 0 0 0 0 0 
 1 1 0 0 0 0 0 0 0 0 0 0 
 1 0 0 0 0 0 0 0 0 0 0 0 
 0 0 0 0 0 0 0 0 1 1 1 1
My "b" has more than 500 elements and my "a" is a satellite image.

Best Answer

ismember(a, b)
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