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Re: matlab compatibility of od45 with adaptive stepping


From: Sebastian Schöps
Subject: Re: matlab compatibility of od45 with adaptive stepping
Date: Sun, 11 Oct 2015 09:36:34 +0200

> I don't have access to matlab right now, so could
> someone please try the following and report the results?
> 
> fun = @(t, x) cos (t);
> o = odeset ('AbsTol', 1e-11, 'RelTol', 1e-11);
> [t, x] = ode45 (fun, [0, 2*pi], 0, o);
> size (t), size (x)
> [t, x] = ode45 (fun, [0, pi, 2*pi], 0, o);
> size (t), size (x)

ans =
   457     1
ans =
   457     1
ans =
     3     1
ans =
     3     1

> My interpratation of the documentation is that size (t) should be [3, 1] in 
> the second case ...

It seems you are right :)


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