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- %function cm = blknrms(mat,blk)
- %
- % Takes block by block norms of matrix MAT.
- % BLK represents the block structure associated with MAT.
- %
- % See also: BLKNORM, MU, PKVNORM, VNORM, and VSVD.
- function cm = blknrms(mat,blk)
-
- [mrows,mcols] = size(mat);
- [nblk,dum] = size(blk);
- for i=1:nblk
- if blk(i,2)==0
- blk(i,2)=blk(i,1);
- end %if
- end %for
- [blkp,repp,fulp,wd,wpert,nrd,ncd] = ptrs(blk);
- % see PTRS for definitions of these variables
- if nrd ~= mcols | ncd ~= mrows
- error('MATIN dimensions incompatible with BLK dimensions')
- return
- end
-
- for i=1:nblk
- for j=1:nblk
- cm(i,j) = norm(mat(blkp(i,2):blkp(i+1,2)-1,blkp(j,1):blkp(j+1,1)-1));
- end
- end
-
- %
- % Copyright MUSYN INC 1991, All Rights Reserved
-