How can I generate a map key for this vector in MATLAB?

Question

I have a function that is looking at a number of elements. Each element is of the form of an 8x1 column vector. Each entry in the vector is an integer less than 1000. Every

Answer 1

The easiest way to generate a key/hash in your case would be to just convert the vector of integer values to a character array using char. Since your integer values never go above 1000, and char can accept numeric values from 0 to 65535 (corresponding to Unicode characters), this will give you a unique 8-character key for every unique 8-by-1 vector. Here's an example:

found = containers.Map('KeyType', 'char', 'ValueType', 'any');

v = randi(1000, [8 1]);  % Sample vector
key = char(v);
if ~isKey(found, key)
  found(key) = 1;
end