?? xode.m
字號(hào):
function xODE
% xODE.m
% Demonstrate how to use ode45() and ode23()
%
% Author: HUANG Huajiang
% Copyright 2003 UNILAB Research Center,
% East China University of Science and Technology, Shanghai, PRC
% $Revision: 1.0 $ $Date: 2003/02/24 $
clear all
clc
format long
y0 = 1;
[x1,y1] = ode45(@f,[0,1],y0)
[x2,y2] = ode23(@f,[0,1],y0)
plot(x1,y1,'k-',x2,y2,'b--')
xlabel('x')
ylabel('y')
% ------------------------------------------------------------------
function dydx = f(x,y)
dydx = y - 2*x/y;
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