The easiest way would be to save them as cella rrays, then sort those out later:
for j = 1:7
[T{j},Y{j}] = ode45(dydt, t, [y0, dy0]);
end
Note the curly brackets {} indicating cell array indexing.
It will be easier to work with them if you define ‘tspan’ as a vector with more than two elements:
t = linspace(0, 5, 50); % time span
This will result in all the arrays having equal numbers of rows.
