05-26.txt

《MATLAB R2007基础教程》 清华大学出版社,包含电子课件,实例原文件,习题答案,都是基于matlab实现

function dydx = twoode(x,y)
  dydx = [ y(2) 
           -abs(y(1))];


function res = twobc(ya,yb)
  res = [ ya(1) 
          yb(1) + 2];


>> solinit = bvpinit(linspace(0,4,5),[1 0]);

>> sol = bvp4c(@twoode,@twobc,solinit);

>> x = linspace(0,4);

>> y = deval(sol,x);

>> plot(x,y(1,:));