Matrix Dimensions must agree

Question

1 个投票

please help me im new at using MATLAB

here is my code

f = 0.05:0.05:0.4;
t = 0:0.01:20;
g = dot(cos(2*pi.*f.*t),sin(2*pi.*f.*t));

and the error is

Matrix dimensions must agree.

g = dot(cos(2*pi.*f.*t),sin(2*pi.*f.*t));

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Answer 1

Jan 2021-3-24

编辑：Jan 2021-3-24

0 个投票

f and t have a different number of elements. Then f .* t is not defined.

You did not tell us, what you want to achieve, but perhaps transposing one of the vectors will do what you want:

g = dot(cos(2*pi * f .* t.'), sin(2 * pi * f .* t.'));
%                        ^^                      ^^ 

Try this:

x = 1:3
y = 4:7
x .* y    % error
x .* y.'  % matrix

Dion Akmal 2021-3-24

can you help me sir, in my code f is scalar