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FreeMat
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Section: Mathematical Functions
Computes the inverse error function for each element of x. The erf function takes only a single argument
y = erfinv(x)
where x is either a float or double array. The output vector y is the same size (and type) as x. For values outside the interval [-1, 1] function returns NaN.
Here is a plot of the erf function over the range [-.9,.9].
--> x = linspace(-.9,.9,100);
--> y = erfinv(x);
--> plot(x,y); xlabel('x'); ylabel('erfinv(x)');
which results in the following plot.