sklearn.utils.sparsefuncs.mean_variance_axis¶
sklearn.utils.sparsefuncs.mean_variance_axis(X, axis)
计算CSR或CSC矩阵上沿轴的均值和方差
| 参数 | 说明 |
|---|---|
| X | CSR or CSC sparse matrix, shape (n_samples, n_features) 输入数据 |
| axis | int (either 0 or 1) 设置沿哪个轴进行计算 |
| 返回值 | 说明 |
|---|---|
| means | float array with shape (n_features,) Feature-wise的平均值 |
| variances | float array with shape (n_features,) Feature-wise的方差 |