Syntax Error using Fcn Block

Question

Jay Talreja 2020-9-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590089-syntax-error-using-fcn-block

评论： Do 2023-6-9

I am trying to use Fcn Block but everytime i get this error

The Expression is (1/Mus)*(Ks*(u[3]-u[4])+Ct*(u([7]-u[2])+Kt*(u[6]-u[4])-u[5]) by taking 7 inputs through Mux and taking as input to Fcn Block

This is the error I am getting

The expression: (1/Mus)*(Ks*(u[3]-u[4])+Ct*(u([7]-u[2])+Kt*(u[6]-u[4])-u[5]) in 'Skyhook_Quater_Car_Me/Quater Car /Fcn1' has a syntax error

Can somebody help me on this..

Thanks in Advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2020-9-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590089-syntax-error-using-fcn-block#answer_490975

编辑：Jan 2020-9-7

You need round parentheses for indexing, not square brackets:

(1/Mus)*(Ks*(u[3]-u[4])+Ct*(u([7]-u[2])+Kt*(u[6]-u[4])-u[5])
% ==>
(1/Mus)*(Ks*(u(3)-u(4))+Ct*(u((7)-u(2))+Kt*(u(6)-u(4))-u(5))

When I insert your expression in Matlab's Command Window, I get the error message:

Error: Unbalanced or unexpected parenthesis or bracket.

and a mark under the first square bracket.

2 个评论
显示无隐藏无

Jay Talreja 2020-9-7

编辑：Jay Talreja 2020-9-7

Error while parsing expression:

(1/Mus)*(Ks*(u(3)-u(4))+Ct*(u((7)-u(2))+Kt*(u(6)-u(4))-u(5))

in 'Skyhook_Quater_Car_Me/Quater Car /Fcn1' token "" was found, whereas ")" was expected

This is the error I am getting now even after checking all the spaceing and brackets.

Jan 2020-9-7

You still have a different number of opening and closing parentheses. I cannot fix this for you, because I do not know the real fromula you want to use.

请先登录，再进行评论。

Answer 2

Tufail Ahmad Bhat 2022-1-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/590089-syntax-error-using-fcn-block#answer_882440

Did you solve the problem? I am getting the same error.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Do 2023-6-9

just replace "[" by "("

请先登录，再进行评论。