Hi Bo
From what I understand, you would like to save only a portion of the results obtained from ODE113.
A simple way to do it is to specify a series of time points at which you would like to save the answer, instead of only providing a time interval.
For example, let us define such a system
function dx = foo(t,x)
dx = sin(100*x);
end
To solve the system on the interval [0,1000], one can use the following code
x0 = 1;
[t,y] = ode113(@foo, [0 1000], x0);
From what I tested, y will be a matrix with 59857 rows.
But if you do the following
[t,y] = ode113(@foo, [0:1:1000], x0)
Then, y will only have 1001 rows.
However, in either way the executing time of ode113 will be the same, otherwise the simulation accuracy will be affected.
-Yu Jiang
