如何运行matlab这个程序

Question

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';

Answer 1

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

Answer 2

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！