left side are not compatible with the size of the right side.

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Jia Hong Loh
Jia Hong Loh 2020-10-17
评论： Adam Danz 2020-10-17
>> A=[-8,5,-2,0;-5,2,1,-2;10,-8,6,-3;3,-2,2,0];
>> b=[-29,-26,25,20];
>> cramer(4)
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
Error in cramer (line 7)
B(:,i) = b;
This is my cramer function:
function cramer(n)
A=[];
b=[];
x=[];
for i=1:n
B=A;
B(:,i) = b;
xi=det(B)/det(A);
x=[x,xi];
end
disp(x)
end

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回答（1 个）

Adam Danz
Adam Danz 2020-10-17
Your cramer function defines b as
b=[];
The loop within that function tries to store the empty value of b in B(:,i) which is of size [1x1] but b is of size [0,0] because it's empty.
B(:,i) = b;
That's why the error message reads,
Unable to perform assignment because the indices on the left side
are not compatible with the size of the right side.

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