在Matlab下输入：edit，然后将下面两行百分号之间的内容，复制进去，保存

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function f=f31(x)

f=1./[(x-2).^2+0.1]+1./[(x-3).^4+0.01];

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 返回matlab主界面

输入:

temp=[1,2,3;4,5,6];

f=f31(temp) %验证x是矩阵输入,程序能跑

x=0:0.01:4;

f=f31(x);

plot(x,f) 2题

在Matlab下输入：edit，然后将下面两行百分号之间的内容，复制进去，保存

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function dydx=zh_lankesterljy(x,y)

dydx=x.^2./y-x.*cos(y);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 在Matlab下面输入：

t_end=5;

y0=[1];

[x,y]=ode45('zh_lankesterljy',[0,t_end],y0);

plot(x,y);

xlabel('x');

ylabel('y');

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