Simulink Port Dimensions Error
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Hello everyone, new to Simulink. I have constant A (dimension is 7*7) multiplied by T (dimension is 1). I also have constant block B (size is 7*2) multiplied by an input block Y (dimensions is 2). I am using matrix multiplied for A*T and for B*Y. Equation therefore is M = A*T + B*Y. The using sum block to add them and output is M. The error is “Error in port widths or dimensions. Invalid dimension has been specified for input pot1” any help would be appreciated and even rules on setting the correct port dimensions would be appreciated.
回答（1 个）
M = A.*T + B*Y %
7 个评论
A = randi([0 7],7,7)
T = randi(1);
B = randi([0 7],7,2)
Y = randi([0 2],2)
M1 = A*T %
M2 = B*Y %
M = [M1,M2] % try this instead
M = A*T + B.*Y % this operation is not possible
Learning
2022-11-22
No, you can change the matrix Y to desired size as
A = randi([0 7],7,7);
T = randi(1);
B = randi([0 7],7,2);
Y = randi([0 2],2,7); % change the size of Y (by zero padding)
M1 = A*T ; %
M2 = B*Y ; %
% M = [M1,M2]; % try this instead
M = A*T + B*Y %
OR use Matrix concatenator and selector blocks in simulink to include them as
M = [M1,M2];
Learning
2022-11-22
VBBV
2022-11-22
7x7, because the resulting size of M is 7x7
Learning
2022-11-22
Change the size of array Y from 2 x1 to 2 x7 as below
A = randi([0 7],7,7);
T = randi(1);
B = randi([0 7],7,2);
Y = randi([0 2],2,1) % change the size of Y (by zero padding)
Y = [Y(1) 0 0 0 0 0 0;Y(2) 0 0 0 0 0 0] % change it 2 x 7 by adding zeros
M = A*T + B*Y %
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