Question

Thus far, I have find(diff(A)==0), however this only proves useful if the elements are adjacent. I am wondering how identify whether or not a number occurs more than once within an array, regardless of position.

Thanks in advance for your time and help. 🙂

Answer 1

Try this. If A is your matrix

C = unique(A);

C will contain the unique elements of A so if the length is the same you have all unique elements. If you want to test a specific value trya

c = sum((A == value)

which will return the number of elements in A equal to value