exm040201.m

matlab电子书籍

clear
rand('state',12)
A=rand(2,4);B=rand(4,3);
%------------------
C1=zeros(size(A,1),size(B,2));		
for ii=1:size(A,1)
	for jj=1:size(B,2)
		for k=1:size(A,2)
			C1(ii,jj)=C1(ii,jj)+A(ii,k)*B(k,jj);
		end
	end
end																		
C1 

%------------------
C2=zeros(size(A,1),size(B,2));	
for jj=1:size(B,2)
	for k=1:size(B,1)
		C2(:,jj)=C2(:,jj)+A(:,k)*B(k,jj);
	end
end	 
C2 

C3=A*B,

C3_C3=norm(C3-C1,'fro')		  
C3_C2=norm(C3-C2,'fro')