How can I write this formula in Matlab?

How can I write this formula in Matlab? Σ ( Xi - X )2 / N

Thanks

[Geoff Hayes]

Omim - this seems like homework where you are expected to determine the variance of N equally likely values. Is this the case? What have you tried so far?

[Omim]

I have tried to write it with symsum, but I receive an error becsuse the numere are în duble format

Answer 1

[Azzi Abdelmalek]

xi=2
x=[1 2 3]
N=3
out=sum((xi-x).^2)/N

Answer 2

[Star Strider]

You might be calculating the variance if ‘X’ is actually the mean of your vector. In that instance, the code would be:

VarX = var(X,1);