Calculates the inverse error function as defined by the following equation:
$$ \operatorname{erfinv}(z)=\sum_{k=0}^{\infty} \frac{c_{k}}{2 k+1}\left(\frac{\sqrt{\pi}}{2} z\right)^{2 k+1} $$
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Syntax |
Description |
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out=erfinv(z); |
Returns the inverse error function of z where z is a scalar number or matrix of scalar numbers. For inputs outside the interval (-1, 1), erfinv returns NaN. |
Example
Plot the inverse error function for -1
z=[-0.99:0.01:0.99]; erfinv_z = erfinv(z); plot(z,erfinv_z,"z","erfinv");
The following figure shows the plot created by the example code.
See Also
List of commands , erf , erfc , erfcinv