vival</em>, above).
Alternatively, users could examine the offending matrices and make
sensible corrections (e.g. to correct rounding errors).</p>
<p>For functions that use the <strong>F</strong> matrix, and where
sexual reproduction is known to occur in the species, we suggest that
users consider filtering the data to exclude entries where
<strong>F</strong> is entirely zero. This is not always desirable
because there are some situations where zero recorded reproduction is
biologically reasonable. We sugg