function and matrix form

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sarngon
sarngon on 26 Jan 2012
codes function kdot=train(t,x) alfa=0.3; beta=0.13; gama=0.16; Ua=1; Ub=2; kdot=[k(2);(2/pi)*(atan((x-4)/0.05)+atan((x-2)/0.05))- (alfa+beta*abs(k(2))+gama*(k(2)^2))+Ua-Ub];
end
and the error line
??? Undefined function or method 'k' for input arguments of type 'double'.
Error in ==> train at 7 kdot=[k(2);(2/pi)*(atan((x-4)/0.05)+atan((x-2)/0.05))-(alfa+beta*abs(k(2))+gama*(k(2)^2))+Ua-Ub];
thanks..
  1 Comment
Jan
Jan on 26 Jan 2012
Please take the time to format the code properly. Currently it is not readable. Look at the "Markup help" link on this page.

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Accepted Answer

Walter Roberson
Walter Roberson on 26 Jan 2012
You have not defined any function or variable named "k", so the k(2) in your function has no meaning.

More Answers (1)

Jan
Jan on 26 Jan 2012
The error message is clear: You try to access k(2), but k is neither a variable nor a function in the path.
What is k?

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