matrix.py 文件源码

def check_finite_real(M):
    '''
    Check that all entries in array M are finite and real-valued
    '''
    if np.any(~np.isreal(M)):
        raise ValueError("Complex value encountered for real vector")
    if np.any(~np.isfinite(M)):
        raise ValueError("Non-finite number encountered")

# need a faster covariance matrix checker