Percent point function (inverse of `CDF`) in pymc

Questions v5
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2

I think there is one, but I forgot. But you can use the pm.math.erf to compute it:

    def cdf(x):
        return 0.5 + 0.5 * pm.math.erf(x / pm.math.sqrt(2))

    def invcdf(x):
        return -pm.math.sqrt(2) * pm.math.erfinv(2*x)
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