How to solve this error?
229 次查看(过去 30 天)
显示 更早的评论
I keep getting this error while running the state space model,
Error in port widths or dimensions. Output port 1 of 'statespacemodel_hvm/Mux' is a one dimensional vector with 2 elements.
Error in port widths or dimensions. Input port 1 of 'statespacemodel_hvm/State-Space' has 3 elements. This port does not accept the dimensions (or orientation) specified by the input signal.
Please help me with this.
4 个评论
Priyatham Ganta
2015-10-31
Can you help me specifically in this.. When i simulate this model, there's always an error
采纳的回答
更多回答(4 个)
Raghav Gopal Rao Netrakanti
2020-4-22
Hi.
I am unable to solve this problem on my end as well.
Description:
I have a discrete state space system of 2 states, 2 inputs and 2 outputs. i.e all A B C D matrices are all 2 by 2. I used the discrete state space block and entered the values. Now my two inputs are 9400 by 1 vectors and i used the constant block to send them as input from the workspace. I have tried with mux and vector concantenate blocks, tried transpose but every time i get the same type of error
"Error in port widths or dimensions. Output port 1 of 'untitled/constant2' is a [9400x2] matrix
"Error in port widths or dimensions. Input port 1 of 'untitled/Discrete State-Space' has 2 elements. This port does not accept the dimensions (or orientation) specified by the input signal."
I hope someone can point out the mistake.
Regards,
Gopal
1 个评论
Walter Roberson
2020-4-25
If your inputs are 9400 x 1 vectors and you are working with 2 x 2 arrays, then I guess you have two of the 9400 x 1 vectors as inputs, representing the two different inputs for "2 inputs and 2 outputs" ?
What output size are you expecting for this 9400 x 1 vector(s) ?If you are expecting to reduce it to 1 x 2 or 2 x 1 then you would need a state space system with 9400 rows or columns in some of the matrices
Hiromasa
2024-6-14
Thank you for your question.
As the error text suggests, the error comes from dimension conflicts between a port and a block.
Ctrl+D updates the Simulink model and shows the signal deminsion as below. The exmaple below also shows the same error messages. You see "?" on input signal and output signal for State Space block. This is because State Space block expects 3 dimension signal while Input port demension is set to 2. Similarly, the dimension conflict occurs between Mux and Outpout port.
You may want to update the dimensions of either ports and/or State Space block to resolve this dimension conflict. Hope this information helps.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1716026/image.png)
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Math Operations 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!