assert_logcond — Computes the condition number of the log function.
[c,y] = assert_logcond ( x )
a n-by-m matrix of doubles
a n-by-m matrix of doubles, the condition number
a n-by-m, matrix of doubles, the function values
Computes the condition number of the exp function. This function is badly conditionned near x=1.
<latex> \begin{eqnarray} c(x) = \frac{1}{|\log(x)|} \end{eqnarray} </latex>