yzcwansui的博客

The result of multiplying a matrix by some vector：is a combination of the columns of the matrixexample:1for each column like this:右乘列向量代表各列加权求和，最终结果是一列for each row like this:左乘一个行向量代表各行加权求...

classificationConfusion matrixOne dimension is Predicter values, other is Actual values, To binary classification:To the Actual valueTrueFalseThe Predicted ValuePositiveNegativeThe meani...