UC知道如何运行matlab这个程序
来源：百度知道 编辑：UC知道 时间：2024/07/08 08:42:57
function U=forwdif(f,c1,c2,a,b,c,n,m)
%Input - f=u(x,0) as a string 'f'
% - c1=u(0,t) and c2=u(a,t)
% - a and b right endpoints of [0,a] and [0,b]
% - c the constant in the heat equation
% - n and m number of grid points over [0,a] and [0,b]
%Output - U solution matrix; analogous to Table 10.4
%Initialize parameters and U
h=a/(n-1);
k=b/(m-1);
r=c^2*k/h^2;
s=1-2*r;
U=zeros(n,m);
%Boundary conditions
U(1,1:m)=c1;
U(n,1:m)=c2;
%Generate first row
U(2:n-1,1)=feval(f,h:h:(n-2)*h)';
%Generate remaining rows of U
for j=2:m
for i=2:n-1
U(i,j)=s*U(i,j-1)+r*(U(i-1,j-1)+U(i+1,j-1));
end
end
U=U';
%Input - f=u(x,0) as a string 'f'
% - c1=u(0,t) and c2=u(a,t)
% - a and b right endpoints of [0,a] and [0,b]
% - c the constant in the heat equation
% - n and m number of grid points over [0,a] and [0,b]
%Output - U solution matrix; analogous to Table 10.4
%Initialize parameters and U
h=a/(n-1);
k=b/(m-1);
r=c^2*k/h^2;
s=1-2*r;
U=zeros(n,m);
%Boundary conditions
U(1,1:m)=c1;
U(n,1:m)=c2;
%Generate first row
U(2:n-1,1)=feval(f,h:h:(n-2)*h)';
%Generate remaining rows of U
for j=2:m
for i=2:n-1
U(i,j)=s*U(i,j-1)+r*(U(i-1,j-1)+U(i+1,j-1));
end
end
U=U';
要运行这个函数，当然是要输入参数的啦，别听楼上 的瞎说，run的时候没有参数输入会报错的。
f,c1,c2,a,b,c,n,m都是参数。
%Input - f=u(x,0) as a string 'f'
% - c1=u(0,t) and c2=u(a,t)
% - a and b right endpoints of [0,a] and [0,b]
% - c the constant in the heat equation
% - n and m number of grid points over [0,a] and [0,b]
%Output - U solution matrix; analogous to Table 10.4
上面这段话说名了这个函数的参数意义以及函数作用，自己慢慢研究一下吧
这个问题太经典了！！！！
拷贝到Matlab编辑器中，全部选中，按F9不就行了啊！