fnorm.m

MFD－多变量系统频域设计工具

function y=fnorm(w,f,p)
%FNORM	Norms of MVFR matrix.
%	FNORM(W,F,p) applies NORM(Fm,p) to each component matrix
%	Fm of the MVFR matrix, F. The results are returned as
%	a column vector of length(W).
%	W is the associated frequency vector.
%	The input argument p is an optional parameter.
%	If p is missing the maximum singular values are returned.
%	For minimum singular values use
%	MIN(FSVD(W,F)')'
%
%	See NORM for further information and an explanation
%	of the possible values for the optional argument p.
%	NOTE: if the component matrices of F are vectors then
%	FNORM returns the vector results of NORM.

%	Dr M.P. Ford 4th August 1987
% Copyright (c) 1987 by GEC Engineering Research Centre & Cambridge Control Ltd

nargs=nargin;
error(nargchk(2,3,nargs));
[m,n]=fsize(w,f);
lw=length(w);
k=1:m;
y=zeros(lw,1);
if nargs==3
  for j=1:lw
    y(j)=norm(f(k+m*(j-1),:),p);  % break up f into matrices
  end
else
  for j=1:lw
    y(j,:)=norm(f(k+m*(j-1),:));  % break up f into matrices
  end
end