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- % function out = vnorm(matin,p)
- %
- % Norm of a VARYING matrix. VNORM operates just as NORM
- % does in standard MATLAB, but on VARYING matrices also.
- % The option P denotes the norm desired. The default is the
- % infinity norm of MATIN just as with NORM.
- %
- % See also: NORM, PKVNORM, VRHO, and VSVD.
-
- function out = vnorm(matin,p)
- if nargin == 0
- disp('usage: out = vnorm(matin,p)');
- return
- end
- [mtype,mrows,mcols,mnum] = minfo(matin);
- if nargin == 1
- p = 2;
- end
- if mtype == 'cons'
- out = norm(matin,p);
- elseif mtype == 'vary'
- npts = mnum;
- nrout = mnum;
- ncout = 2;
- out = zeros(npts+1,2);
- ff = (npts+1)*mrows;
- pt = 1:mrows:ff;
- ptm1 = pt(2:npts+1)-1;
- for i=1:npts
- out(i,1) = norm(matin(pt(i):ptm1(i),1:mcols),p);
- end
- out(1:npts,2) = matin(1:npts,mcols+1);
- out(npts+1,1) = npts;
- out(npts+1,2) = inf;
- elseif mtype == 'syst'
- error('VNORM is undefined for SYSTEM matrices');
- return
- else
- out = [];
- end
- %
- % Copyright MUSYN INC 1991, All Rights Reserved
-