0001 function x=nt_demean2(x,w)
0002
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0011
0012 if nargin<2; w=[]; end
0013 if nargin<1; error('!');end
0014
0015 if ~isempty(w) && numel(w)<size(x,1)
0016 w=w(:);
0017
0018 if min(w)<1 || max(w)>size(x,1);
0019 error('w interpreted as indices but values are out of range');
0020 end
0021 ww=zeros(size(x,1),1);
0022 ww(w)=1;
0023 w=ww;
0024 end
0025
0026 if ndims(x)==4;
0027 for k=1:size(x,4);
0028 if isempty(w);
0029 x(:,:,:,k)=nt_demean2(x(:,:,:,k));
0030 else
0031 if ndims(w)==4;
0032 x(:,:,:,k)=nt_demean2(x(:,:,:,k),w(:,:,:,k));
0033 else
0034 x(:,:,:,k)=nt_demean2(x(:,:,:,k),w);
0035 end
0036 end
0037 end
0038 return
0039 end
0040
0041 if ~isempty(w)
0042 if size(w,3)==1 && size(x,3)~=1;
0043 w=repmat(w,[1,1,size(x,3)]);
0044 end
0045 if size(w,3)~=size(x,3)
0046 error('W should have same npages as X, or else 1');
0047 end
0048 end
0049
0050 [m,n,o]=size(x);
0051 if isempty(w)
0052 x=reshape(nt_demean(reshape(x,m,n*o)), [m,n,o]);
0053 else
0054 w=repmat(w,[1,n,1]);
0055 x=reshape(nt_demean(reshape(x,m,n*o),reshape(w,m,n*o)),[m,n,o]);
0056 end
0057