Function atanh

numexpr3/missing_posix_functions.hpp:66–72

}

inline double atanh(double x)
{
    /* This definition is different from that in NumPy 1.3 and follows
    the convention of MatLab.  This will allow for double checking both
    approaches. */
    return 0.5*log((1.0+x)/(1.0-x));
}


// Single precision versions