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

[Jan]

Please post, what you have tried so far and ask a specific question. The forum will not solve your homework.

[madhan ravi]

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

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Guillaume]

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

[kareem maslah]

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