kshape.py 文件源码

def zscore(a, axis=0, ddof=0):
    a = np.asanyarray(a)
    mns = a.mean(axis=axis)
    sstd = a.std(axis=axis, ddof=ddof)
    if axis and mns.ndim < a.ndim:
        res = (((a - np.expand_dims(mns, axis=axis)) /
                np.expand_dims(sstd,axis=axis)))
    else:
        res = (a - mns) / sstd
    return np.nan_to_num(res)