Name
erfinv — The inverse of the error function.
Calling Sequence
y = erfinv(x)
Parameters
- x
real vector or matrix
- y
real vector or matrix (of same size than x)
Description
erfinv
computes the inverse of the error function
erf
.
x = erfinv(y)
satisfies y = erf(x)
,
-1 <= y
< 1, -inf <= x
<= inf.
Examples
x=linspace(-0.99,0.99,100);
y=erfinv(x);
plot2d(x,y)
norm(x-erf(y),'inf')
References
Milton Abramowitz and Irene A. Stegun, eds. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. New York: Dover, 1972.