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43 lines
666 B
Matlab
43 lines
666 B
Matlab
function R=mrk(phi,k,v)
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% compute M^k_v for v='cos'|'sin'|'one'
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n=ceil(sqrt(2*length(phi)+1));
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R=eye(n);
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id=0;
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for i=1:(n-1),
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for j=i+1:n,
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id=id+1;
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plain(id,:)=[i,j];
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end;
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end
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if (v=='cos')
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drot=zeros(n,n);
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drot(plain(k,:),plain(k,:))=[1,0;0,1];
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else if (v=='sin')
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drot=zeros(n,n);
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drot(plain(k,:),plain(k,:))=[0,1;-1,0];
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else if (v=='one')
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drot=eye(n);
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drot(plain(k,:),plain(k,:))=[0,0;0,0];
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else
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disp('v is unknown, exitig');
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return
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end;
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end;
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end;
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for id=1:length(phi),
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r=eye(n);
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if (id == k)
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r=drot;
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else
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r(plain(id,:),plain(id,:))=[cos(phi(id)),sin(phi(id));-sin(phi(id)),cos(phi(id))];
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end;
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R=r*R;
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end;
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