Computes a `p`

by `p`

matrix describing parasite dispersal from infecteds (columns)
to infectees (rows).
$$\mathcal{Z} = e^{-\Omega\tau} \cdot \mbox{diag}\left( \frac{fq M}{W} \right) \cdot {\cal D} \cdot fq\Omega^{-1}$$

## Arguments

- Omega
the mosquito demography matrix

- tau
duration of the extrinsic incubation period

- f
the feeding rate

- q
fraction of bloodmeals taken on humans

- M
size of mosquito population in each patch

- W
ambient human population at each patch

- calD
parasite dispersal by humans matrix (see metric_calD)

## Value

a numeric matrix