why computeCost function shows incorrect dimension error in second call?

Question

Tshering Lhamo 2020-9-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590614-why-computecost-function-shows-incorrect-dimension-error-in-second-call

编辑： Hritika Suneja 2021-1-4

h = X * theta;
sq_error = (h - y) .^ 2;
J = 1/(2*m) * sum(sq_error);
correcting the code with error message shows error in first call too.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Hritika Suneja 2020-12-31

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590614-why-computecost-function-shows-incorrect-dimension-error-in-second-call#answer_588173

编辑：Hritika Suneja 2021-1-4

As the error suggests , the dimensions of the matrix being multiplied might not be consistent. In order to multiply 2 matrix the number of columns in the first matrix should match the number of rows in the second matrix. This condition might not be getting satisfied in your code and hence this error occurs.