# Simple matlab code issue

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Leora il 16 Set 2014
Commentato: Youssef Khmou il 16 Set 2014
I have an issue with a very basic code using matrices. I had to define 3 matrices and do a few operations. I got them all correct except for the last one. It says the dimensions don't match but that is what the question is telling me to do. Any help would be appreciated.
A=[1,2,3;4,5,6;7,8,9]; %Defining matrices A,B and C B=[2,8,2;1,1,1;7,0,2]; C=[2;0;1]; A+B A.*B transpose(C)*B inv(A)*(C).^1 B+(C).^2
The last one is incorrect and the question asks me to do B+C^2
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Leora il 16 Set 2014
The error says error using + dimensions must agree

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### Risposte (2)

Youssef Khmou il 16 Set 2014
Modificato: Youssef Khmou il 16 Set 2014
The quantity (C')*B*inv(A)*(C).^1 is scalar, and B+C.^2 is not correct :
B+(C*C').^2;
is correct
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Leora il 16 Set 2014
But my code says B+C.^2 and its still wrong
Youssef Khmou il 16 Set 2014

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Hikaru il 16 Set 2014
B is a 3x3 matrix and C.^2 is a 3x1 matrix. There's no way you can add them. If you want to square matrix C (i.e. C^2), then C has to be a square matrix as well.
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