Class DDE

Integrator for delay differential equations. For integrating ordinary differential equations, see Dopri.

Hierarchy

Constructors

constructor

Methods

initialise run statistics steps

Constructors

constructor

Methods

initialise

  • initialise(t: number, y: number[]): DDE

  • Initialise the solver

    Parameters

    • t: number

      The time to start integrating from

    • y: number[]

      The initial conditions

    Returns DDE

run

  • run(tEnd: number): ((t: number[]) => number[][])

  • Integrate the solution through to some time

    Parameters

    • tEnd: number

      End time of the integration

    Returns ((t: number[]) => number[][])

      • (t: number[]): number[][]

      • This is essentially a vectorised version of InterpolatedSolution, accepting a vector of times.

        Returns

        A vector of vectors; element [i][j] is the jth variable at the ith time in t

        Parameters

        • t: number[]

          Vector of times to request the solution at

        Returns number[][]

statistics

  • statistics(): { lastError: number; nEval: number; nSteps: number; nStepsAccepted: number; nStepsRejected: number; stiffNNonstiff: number; stiffNStiff: number }

  • Return statistics about the integration so far

    Returns { lastError: number; nEval: number; nSteps: number; nStepsAccepted: number; nStepsRejected: number; stiffNNonstiff: number; stiffNStiff: number }

    • lastError: number

      The last estimated error in the solution

    • nEval: number

      The number of evaluations of the rhs function

    • nSteps: number

      The number of steps attempted

    • nStepsAccepted: number

      The number of steps accepted

    • nStepsRejected: number

      The number of steps rejected

    • stiffNNonstiff: number

      The number of stiff checks that were non-stiff

    • stiffNStiff: number

      The number of stiff checks that were stiff

steps

  • steps(): number[]

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