Computes a n by n matrix describing parasite dispersal from infecteds (columns)
to infectees (rows).
$$\mathcal{R} = b \beta \cdot {\cal V} \cdot \mbox{diag}\left(W \right) \cdot \beta^T \cdot \mbox{diag}\left(DH\right)$$
metric_calR(b, beta, calV, W, D, H)transmission efficiency from mosquitoes to humans
the biting distribution matrix
parasite dispersal by mosquitoes matrix (see metric_calV)
ambient human population at each patch
human transmitting capacity
human population size of each strata
a numeric matrix