public static double logquantile(double val, double loc, double scale) {
    return loc + scale * (val - MathUtil.log1mexp(-val));
  }
public static double logquantile ( double val , double loc , double scale ) { return loc + scale * ( val - MathUtil . log1mexp ( - val ) ) ; }
log Quantile function.

TODO: untested.

@param val Value
@param loc Location
@param scale Scale
@return Quantile