Does Matlab have its own RK4 package?

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jake smith
jake smith 2015-10-16
评论： Walter Roberson 2015-10-16
Does Matlab have its own Runge Kutta package or must I write my own? I am looking for an algorithm for n equations.

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Star Strider
Star Strider 2015-10-16
MATLAB has a powerful set of built-in ODE and related differential equation solvers (and partial differential equation solvers in the Partial Differential Equation Toolbox). See the documentation for ode45 and its friends for details. There might be others in the File Exchange.
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jake smith
jake smith 2015-10-16
编辑：jake smith 2015-10-16
No I already went to the link, but do you mean there is a download page for the documentation (like what Mathematica/Maple does)? Because I don't see a download link.
I already have a code of my own, but I just wanted to compare it with what MatLab historically has and check some consistency.
It's a really basic RK4. I can make one up right now (this is in norm form for convenience).
y1' = y1+y2+y3
y2 = y1'
y2' = y1*y3+y_2
y3 = y2'
y3' = y2+ y1*y2^3
Let's say I add initial conditions.
(y1(0), y2(0), y3(0)) = (0,1,2)
Walter Roberson
Walter Roberson 2015-10-16
There is no download link for the documentation; that is the link to the documentation for ode45.

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