why computeCost function shows incorrect dimension error in second call?

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.

Answer 1

[Hritika Suneja]

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.