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Description: function [tout, yout] = rk4(ypfun, tspan, y0, h)
％定步长四阶Runge-Kutta法求常微分方程(组)数值解
％[tout,yout] = rk4( ypfun , tspan, y0,h)
％ 这里字符串ypfun是用以表示f(t, y)的M文件名,
％ tspan=[t0, tfinal]表示自变量初值t0和终值tf
％ y0表示初值向量y0，h是步长。
％ 输出列向量tout表示节点 (t0 , t1 , … , tn)
％ 输出矩阵yout 表示数值解，每一列对应y的一个分量-function [tout, yout] = rk4 (ypfun. tspan, y0, h)% fixed step four-stage Runge- Kutta method for ordinary differential equations (Group) numerical solution% [tout. yout] = rk4 (ypfun, tspan, y0, h)% string ypfun here is used to indicate that f (t, y) M name, tspan% = [t0. tfinal] said variable initial and final t0 tf% y0 said initial vector y0, h is a step. % Output column vector tout said Node (t0, t1, ..., tn)% output matrix yout said numerical solution, each y counterparts out of a weight
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Author: 王志波 |
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Description: 四阶RK方法计算单波方程，偏微分方程数值解，Fortran编写。-Fourth-order RK method, single wave equation, numerical solution of partial differential equations, Fortran prepared.
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Size: 1024 |
Author: 吴俊宏 |
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Description: 洛伦兹方程的四阶龙哥库塔法求解例子，很好，很实用，我一直都用它。不懂可以联系：xznuwang@163.com-Lorenz equations Kutta fourth-order method龙哥example, very good, very practical, I have been using it. Do not know how you can contact: xznuwang@163.com
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Size: 148480 |
Author: jingling |
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Description: LESLIE GOWER EQUATIONS BY RK4
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Size: 1024 |
Author: tarek |
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Description: these are matlab files in relation to RK4
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Size: 7168 |
Author: pearl |
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Description: 龙格库塔四阶方法，matlab编程，仅供参考-Runge-Kutta fourth-order method, matlab programming, reference
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Size: 20480 |
Author: 江冬 |
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Description: 一个比较简单的基于Matlab的编程的Rk4 算例，抛砖引玉吧。-A relatively simple Matlab-based programming Rk4 example and attract valuable comments bar.
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Size: 2048 |
Author: William |
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Description: 采用四阶龙格——库塔算法，应用MATLAB编写的常微分方程、偏微分方程求解算法及界面。
关键词：gui,ode,pde,difference method, runge kutta,euler,heun
MATLAB版本：7.0 (R14)-EULER.m HEUN.m Rk4.M implement euler heun and runge kutta fourth order to solve ODE VANDERPOLODE.m LOGISTICOODE.m PREDAPREDATOREODE.m describe some ODE problems (van der pol- prey predator- logistic model) diffcorda.m implement difference method for vibrating string (see pizzicata.m) EQUATIONGUI.m is the main program
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Size: 35840 |
Author: 谢刚 |
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Description: euler, runge kutta and others in a GUI
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Size: 26624 |
Author: robertotelco |
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Description: using Matlab prepared by the four bands Runge-Kutta procedure
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Size: 15360 |
Author: smiler |
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Description: 1.用四阶 Runge-Kutta 法求数值积分的函数为 RK4
2.此函数的入口参数为：系统维数 dimension,仿真时间 tspan 。
3.tspan 的格式为 [a:h:b] . 其中 a 表示起始时间，h 表示步长，b 表示终止时间。
4.仿真模型的状态方程、输出方程的系数矩阵以及系统初值均存放于文件 input information.txt 中。
5.仿真结果存放于文件 result.txt 中。
6.运行举例：
将 M 文件 RK4.m 和 input information.txt 均存放于 Matlab 的当前工作目录下，然后在 Command Window 中输入以下命令：
dimension=3
tspan=[0:0.01:2]
RK4(dimension,tspan)
回车后，打开 Matlab 的当前工作目录文件夹，找到文件 result.txt ，即可看到仿真结果。-1. Numerical Integration function with fourth-order Runge-Kutta method RK4 2. Inlet parameters of this function: the system dimension dimension, the simulation time tspan. 3.tspan Formats for [a: h: b], wherein A represents a start time, h is the step length, b indicates the termination time. The equation of state of the simulation model, the coefficient matrix of the equation as well as the system initial value of the output is stored in the file input information.txt. The 5. Simulation results are stored in a file result.txt. Running example: the the M file RK4.m and input information.txt of are placed in Matlab current working directory, then enter the following command in the Command Window: dimension = 3 tspan = [0:0.01:2] RK4 (dimension, tspan) Enter, open Matlab' s current working directory folder find the file result.txt, you can see the simulation results.
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Size: 1024 |
Author: 闫兆敏 |
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Description: 数值计算matlab例程，用RK4算法求解Lorenz方程，验证蝴蝶效应-RK4，Lorenz Equation
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Size: 1024 |
Author: 扣扣 |
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Description: 常微分方程初值问题数值解matlab程序，使用RK4\AB4\AB4-AM4等方法-Initial value problems of ordinary differential equations matlab program, using RK4 \ AB4 \ AB4-AM4 methods
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Size: 1024 |
Author: shane |
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Description: This the Runge-Kutta algorithm, wich is not present in matlab.-This is the Runge-Kutta algorithm, wich is not present in matlab.
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Size: 1024 |
Author: tabdou17 |
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Description: 数值计算的四阶龙格库塔格式的matlab程序-Numerical calculation of the fourth order Runge Kuta format matlab program
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Size: 5120 |
Author: 沈靖 |
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Description: 使用matlab编写程序，打靶法实现微分方程求解。(Solving differential equation by shooting method)
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Size: 1024 |
Author: wokuang2212
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Description: matlab file training for student in class
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Size: 1024 |
Author: parsian238
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Description: Asynchroouss machines diagnosis with Rung-Kuta method
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Size: 5120 |
Author: Nabil18 |
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Description: Runge-Kutta法中最常用的是：四阶五级变步长算法。德国学者Felhberg对传统Runge-Kutta法进行了改进，得到了四阶五级变步长算法，也叫FRK算法。下面是标准四阶龙格-库塔法的Matlab程序
(Runge-Kutta method most commonly used are: FOURTH ORDER five variable step algorithm. German scholars Felhberg traditional Runge-Kutta method is improved to give a fourth-order five variable step algorithm, also called FRK algorithms. Here is the standard Runge- Kutta method of Matlab program)
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Size: 1024 |
Author: 李琼阁 |
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Description: Galerkin method,a numerical approximate method based on,commonly used in ordinary differential equation.
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Size: 623616 |
Author: cleaaar |
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