normex2.m

matlab宝典,电子工业出版社,包含该书的源码2-4章

%输入矩阵
A=hilb(5);
%使用定义求解各阶范数
N1=max(sum(abs(A)));
N2=norm(A);
Ninf=max(sum(abs(A')));
Nfro=sqrt(sum(diag(A'*A)));
%使用norm命令求解范数
n1=norm(A,1);
n2=norm(A,2);
ninf=norm(A,inf);
nfro=norm(A,'fro');
%输出求解的结果
disp('The method of definition:')
fprintf('The 1-norm is %6.4f\n',N1)
fprintf('The 2-norm is %6.4f\n',N2)
fprintf('The inf-norm is %6.4f\n',Ninf)
fprintf('The Ff-norm is %6.4f\n',Nfro)
fprintf('\n//-------------------------------//\n\n')
disp('The method of norm command:')
fprintf('The 1-norm is %6.4f\n',n1)
fprintf('The 2-norm is %6.4f\n',n2)
fprintf('The inf-norm is %6.4f\n',ninf)
fprintf('The F-norm is %6.4f\n',nfro)