This blocks computes the output y as the
natural (base e) logarithm of the input u.
Optionally, the input u can be processed conjugate
complex, when parameter useConjugateInput is
true. Depending on useConjugateInput the
internal signal uInternal represents either the
original or the conjugate complex input signal.
y = log(uInternal);
An error occurs if the elements of the input u is
zero.
