Angelo Port a écrit :
> Hi,
Hello,
First, please use a marker like [math] when posting to this list
according to the commons component you use. This list is shared by
several components, so it helps subscribers filter the messages.
>
>
>
> I am attempting to use the Dormand-Prince 54 integrator. I get the following
> error:
>
> org.apache.commons.math.ode.IntegratorException: dimensions mismatch: ODE
> problem has dimension 0, initial state vector has dimension 6
> at
> org.apache.commons.math.ode.AdaptiveStepsizeIntegrator.sanityChecks(AdaptiveStepsizeIntegrator.java:177)
> at
> org.apache.commons.math.ode.EmbeddedRungeKuttaIntegrator.integrate(EmbeddedRungeKuttaIntegrator.java:179)
>
> Did I forget to set the dimension? If so, how is this done?
The problem you pass to the integrator implements the
FirstOrderDifferentialEquations interfaces, which has a getDimension()
method. This method must provide the dimension of the set of
differential equations it computes. In your case, I guess you should have:
public int getDimension() {
return 6;
}
This must be consistent with the dimension of the state vector.
Luc
>
>
>
> Angelo
>
>
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