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I have the following problem to solve. My system can be defined as a set of coupled differential equations as described below:

dy/dt = -a*y(t) + b*x(t) + (m-y(t))*r;

dx/dt = a*y(t) - b*x(t) + (n-x(t))*r;

where m,n and r are constants. I have the values of y(t) and x(t) for different values of t. The above dy/dt and dx/dt are based on theoretical interpretation (and I do not have their values). For the given set of x(t), y(t), I would like to find the coefficients 'a' and 'b' fitting the above system.

Appreciate your help in solving this problem in any package (preferably matlab)

Kind Regards

Subbu

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# Solving Coupled Differential Equations (in Matlab)

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