I got this this error when I run the program (Error while parsing expression)

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Mohammed AL-hadi
Mohammed AL-hadi 2021-8-7
评论： Mohammed AL-hadi 2021-8-7
I am using a function with different inputs but I got this error
Error while parsing expression: (((u(1))–(cax*(u(2))*(u(2)))–(jr*(u(5))*(u(3)))–((iz-iy)*(u(3))*(u(4))))/(ix)) in 'Final_Modelling_Sub/Quadcopter System Dynamics/Translational & Rotational Dynamics/Phidd Equation1' token "" was found, whereas ")" was expected

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Walter Roberson
Walter Roberson 2021-8-7
(((u(1))–(cax*(u(2))*(u(2)))–(jr*(u(5))*(u(3)))–((iz-iy)*(u(3))*(u(4))))/(ix))
That code is using unicode U+2013 "EN DASH" instead of U+002D "hyphen-minus" which is the - character
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Walter Roberson
Walter Roberson 2021-8-7
Ran in:
S = '(((cos(u(2))*cos(u(4))*sin(u(3)))+(sin(u(2))*(sin(u(4)))*(u(1)))-(cdx*(u(5))))/(m)'
S = '(((cos(u(2))*cos(u(4))*sin(u(3)))+(sin(u(2))*(sin(u(4)))*(u(1)))-(cdx*(u(5))))/(m)'
% 123  4 5 43 4 5 43 4 5 432 3 4 5 43 4 5 6 543 4 5 432 3 4 5 4321 2 1
sum(S == '(')
ans = 21
sum(S == ')')
ans = 20
21 open brackets, 20 closing brackets.
The numbers above are the number of bracket levels in effect "after" the character above has been executed. You can see that you get back to 1, but you should be getting back to 0 instead.

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