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/** * The Inverse [Gaussian error function](http://en.wikipedia.org/wiki/Error_function) * returns a numerical approximation to the value that would have caused * `errorFunction()` to return x. * * @param {number} x value of error function * @returns {number} estimated inverted value */function inverseErrorFunction(x) {    const a = (8 * (Math.PI - 3)) / (3 * Math.PI * (4 - Math.PI));
    const inv = Math.sqrt(        Math.sqrt(            Math.pow(2 / (Math.PI * a) + Math.log(1 - x * x) / 2, 2) -                Math.log(1 - x * x) / a        ) -            (2 / (Math.PI * a) + Math.log(1 - x * x) / 2)    );
    if (x >= 0) {        return inv;    } else {        return -inv;    }}
export default inverseErrorFunction;