How to check the complementary time-dependent term of differential equations.

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CT
CT 2021-6-7
评论： CT 2021-6-7
https://jp.mathworks.com/matlabcentral/answers/99007-
Is there any way to check how the time-dependent term ft in the following code is completed by interp1?
function [T1,Y1] = ode_param_sample1()
TSPAN = [0 pi/2];
IC = 1;
tv = linspace(0,pi/2,10);
ftv = sin(tv);
[T1 Y1] = ode45(@myODE1, TSPAN, IC);
function dydt1 = myODE1(t1,y1)
ft = interp1(tv, ftv, t1,'spline');
dydt1 = - ft *y1;
end
end
I want to check the ft in this code.
By checking, I mean I want to compare it with the original time-variant parameters, such as plotting it on a graph.

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回答（1 个）

SALAH ALRABEEI
SALAH ALRABEEI 2021-6-7
% Try this
function [T1,Y1] = ode_param_sample1()
TSPAN = [0 pi/2];
IC = 1;
tv = linspace(0,pi/2,10);
ftv = sin(tv);
ft = interp1(tv, ftv, T1,'spline');
plot(tv,ftv,'or',T1,ft,'b')

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