Expectation in Matlab

[GRIFINA]

I have a formula about covariance matrix of channel like:

Ch = diag{ E[abs(h1)²] E[abs(h2)²] .... E[abs(h(Δ)² }

Δ in here mean number of channel impulse response, And I want ask to all of you about change this formula into matlab ,can anybody explain this, coz Iam very confuse about the sign E in my formula,

Thanks a lot please help me , its so urgent

 

[priyaa8589@gmail.com]

hi,
i also need some information about expectation propagation.if u have tutorial on it means help me