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annotate +time/Rungekutta4proper.m @ 846:c6fcee3fcf1b feature/burgers1d

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Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 20 Sep 2018 17:51:19 +0200
parents e1a05acc1b5d
children
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1 classdef Rungekutta4proper < time.Timestepper
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2 properties
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3 F
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4 k
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5 t
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7 m
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8 n
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9 end
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12 methods
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13 % Timesteps v_t = F(v,t), using RK4 fromt t = t0 with timestep k and initial conditions v = v0
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14 function obj = Rungekutta4proper(F, k, t0, v0)
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15 obj.F = F;
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16 obj.k = k;
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17 obj.t = t0;
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18 obj.v = v0;
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19 obj.m = length(v0);
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20 obj.n = 0;
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21 end
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23 function [v,t] = getV(obj)
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24 v = obj.v;
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25 t = obj.t;
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26 end
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28 function obj = step(obj)
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c6fcee3fcf1b Add generalized RungeKutta and RungeKuttaRV class which extracts its coefficients from a butcher tableau, specified on the scheme.
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29 obj.v = time.rk.rungekutta_4(obj.v, obj.t, obj.k, obj.F);
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30 obj.t = obj.t + obj.k;
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31 obj.n = obj.n + 1;
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32 end
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33 end
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36 methods (Static)
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37 function k = getTimeStep(lambda)
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38 k = rk4.get_rk4_time_step(lambda);
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39 end
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40 end
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42 end