For matrices, mean (X) is a row vector containing the mean value of each column.

对于矩阵来说，MEAN (X)是包含了每列平均值的行向量。

youdao

This way 2... I could take that row times my vector.

折中方法2…我取那一行乘以我的向量。

youdao

This way 2... I could take that row times my vector.

折中方法2…我取那一行乘以我的向量。

youdao