Get extra outputs from a function called via odesolver

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Jose 2012-4-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34195-get-extra-outputs-from-a-function-called-via-odesolver

Hello

I'm modelling a system of differential algebraic equations, I make a file to use/call the ode solver on the model inside fun(t,y)

function [t,y,...]=callDAE
[t1,y1]=ode15s(@(t,y) fun(t,y),tspan,y0,options);
.
.
.
end

(In options I define the DAE mass matrix)

Inside fun(t,y) I calculate a lot of variables.

Using the outputs for [t1,y1], It's posible to calculate again the same variables in callDAE, but that mean to write again a lot of functions, and some other problems. So I wan't to know if is possible to get the variables calculated inside fun(t,y) to use them on callDAE?

Just as an example, the next code is something like I want, but the odesolvers can't be used that way:

function [t,y,...]=callDAE
[t1,y1,Kp,Lq,Rz,Mw,...]=ode15s(@(t,y) fun(t,y),tspan,y0,options);
.
.
.
end

The syntaxis on the example is not possible, according to the odesolver. The syntaxis is like on the documentation [T,Y,TE,YE,IE] = solver(odefun,tspan,y0,options), but that give 'events' relationed variables, im not interested on them.

Please tell if im not clear enough. Thanks