How can i write this Lyapunov equation in Matlab?

3 次查看(过去 30 天)
Hello,
I would like to ask you how can i write this equation? I am new in Matlab, and i tried this code:
n = 100000;
x0 = 0.1;
step = 0.001;
e = exp(1);
a = [0.001 : step : 0.05];
a * e.^(n * lyap(a)) == abs(f.^n .* (x0 + a) - f.^n .* (x0));
e.^(n.* lyap(a)) == abs(f.^n .*(x0+a) - f.^n .* (x0));
lyap(a) == (1/n) .* ln((abs(f.^n * (x0+a) - f .^n * (x0))/a));
but i have this error:
>> Lyapunov
Error using lyap (line 23)
Not enough input arguments.
Error in Lyapunov (line 7)
a * e.^(n * lyap(a)) == abs(f.^n .* (x0 + a) - f.^n .* (x0));
Is it completely wrong or do i miss something?
Thank you!

回答(1 个)

Shivang Srivastava
Shivang Srivastava 2021-3-25
Hi Eleni,
As per my understanding you are having trouble using lyap function. As the error suggest you have not sent sufficient parameters in lyap function.
X = lyap(A,Q)
This is the correct syntax for lyap function. You may refer to lyap documentation for more information.

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