disteusq.m
资源名称:speech.rar [点击查看]
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上传日期:2014-12-04
资源大小:11427k
文件大小:3k
源码类别:
语音合成与识别
开发平台:
Matlab
- function d=disteusq(x,y,mode,w)
- %DISTEUSQ calculate euclidean, squared euclidean or mahanalobis distance D=(X,Y,MODE,W)
- %
- % Inputs: X,Y Vector sets to be compared. Each row contains a data vector.
- % X and Y must have the same number of columns.
- %
- % MODE Character string selecting the following options:
- % 'x' Calculate the full distance matrix from every row of X to every row of Y
- % 'd' Calculate only the distance between corresponding rows of X and Y
- % The default is 'd' if X and Y have the same number of rows otherwise 'x'.
- % 's' take the square-root of the result to give the euclidean distance.
- %
- % W Optional weighting matrix: the distance calculated is (x-y)*W*(x-y)'
- % If W is a vector, then the matrix diag(W) is used.
- %
- % Output: D If MODE='d' then D is a column vector with the same number of rows as the shorter of X and Y.
- % If MODE='x' then D is a matrix with the same number of rows as X and the same number of columns as Y'.
- %
- % Copyright (C) Mike Brookes 1998
- %
- % Last modified Fri Jan 7 08:59:48 2000
- %
- % VOICEBOX is a MATLAB toolbox for speech processing. Home page is at
- % http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
- %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % This program is free software; you can redistribute it and/or modify
- % it under the terms of the GNU General Public License as published by
- % the Free Software Foundation; either version 2 of the License, or
- % (at your option) any later version.
- %
- % This program is distributed in the hope that it will be useful,
- % but WITHOUT ANY WARRANTY; without even the implied warranty of
- % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- % GNU General Public License for more details.
- %
- % You can obtain a copy of the GNU General Public License from
- % ftp://prep.ai.mit.edu/pub/gnu/COPYING-2.0 or by writing to
- % Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA.
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- [nx,p]=size(x); ny=size(y,1);
- if nargin<3 | isempty(mode) mode='0'; end
- if any(mode=='d') | (mode~='x' & nx==ny)
- nx=min(nx,ny);
- z=x(1:nx,:)-y(1:nx,:);
- if nargin<4
- d=sum(z.*conj(z),2);
- elseif min(size(w))==1
- wv=w(:).';
- d=sum(z.*wv(ones(size(z,1),1),:).*conj(z),2);
- else
- d=sum(z*w.*conj(z),2);
- end
- else
- if p>1
- if nargin<4
- z=permute(x(:,:,ones(1,ny)),[1 3 2])-permute(y(:,:,ones(1,nx)),[3 1 2]);
- d=sum(z.*conj(z),3);
- else
- nxy=nx*ny;
- z=reshape(permute(x(:,:,ones(1,ny)),[1 3 2])-permute(y(:,:,ones(1,nx)),[3 1 2]),nxy,p);
- if min(size(w))==1
- wv=w(:).';
- d=reshape(sum(z.*wv(ones(nxy,1),:).*conj(z),2),nx,ny);
- else
- d=reshape(sum(z*w.*conj(z),2),nx,ny);
- end
- end
- else
- z=x(:,ones(1,ny))-y(:,ones(1,nx)).';
- if nargin<4
- d=z.*conj(z);
- else
- d=w*z.*conj(z);
- end
- end
- end
- if any(mode=='s')
- d=sqrt(d);
- end