how to use function and ode45

hello friends,
can you help me to write that in matlab? they ask "write this equations in matlab function" for the first quastion .....the second quastion is to call the function and use ode45
when q=1 m1=2 m2=2 R1=1 R2=2 g=9.82 b=0.001
thank you

3 个评论

Please post, what you have tried so far and ask a specific question. The forum will not solve your homework.
https://www.mathworks.com/help/matlab/ordinary-differential-equations.html - take your time read it , understand , try something and come back with specific question/s
(Answers Dev) Restored edit

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Guillaume
Guillaume 2019-2-1

2 个投票

i got a complex numbers! [...] .the question is why!?
  • You're taking the root of a negative number ,
  • Or you're calculating the arcsin or arccos of a number outside [-1 1],
  • Or you're doing any other mathematical operation that can result in complex numbers
Reread the formulae that you wrote. In particular, note that x^.2 is . Perhaps you meant x.^2

1 个评论

thank you my friend...i didnt notice that for two hours ! the (x^.2)! now the function is working

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