assert_erfinvcond — Computes the condition number of the erfinv function.
[c,y] = assert_erfinvcond ( 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 erfinv function. The erfinv function has a large condition number if
<latex> \begin{eqnarray} c(x) = \frac{\sqrt{\pi}}{2} \exp(y^2) \left| \frac{x}{f(x)} \right| \end{eqnarray} </latex>
where
<latex> \begin{eqnarray} f(x) = \mbox{erfinv}(x) \end{eqnarray} </latex>