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)
a numeric matrix