74 lines
1.2 KiB
Scilab
74 lines
1.2 KiB
Scilab
function [x]=shift(x,varargin)
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[nargout,nargin] = argn(0)
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//% mode 1 : [ x1(t), x1(t-1), ..., x2(t), x2(t-1), ... ]
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//% mode 2 : [ x1(t), x2(t), ..., x1(t-1), x2(t-1), ... ]
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z = -1;
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%mode = 2;
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if nargin>1 then
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z = varargin(1)';
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end
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if nargin>2 then
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%mode = varargin(2);
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end
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[n,k] = size(x);
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//! unknown arg type, using mtlb_length
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nz = mtlb_length(z);
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if z==[] then
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%v1=[n,0]
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x = zeros(%v1(1),%v1(2));
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return
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end
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maxz = max([0,z]);
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minz = abs(min([0,z]));
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%v=[minz,k]
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%v=[maxz,k]
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x = [%nan*zeros(%v(1),%v(2));x;%nan*zeros(%v(1),%v(2))];
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//n = n + maxz + minz;
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m = (1:n)';
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%v=[1,k*nz]
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m = m(:,ones(%v(1),%v(2)));
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select %mode
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case 1 then
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t = 0:n+maxz+minz:(k-1)*(n+maxz+minz);
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%v1=[nz,1]
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t = t(ones(%v1(1),%v1(2)),:);
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t = t(:)';
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%v1=[n,1]
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t = t(ones(%v1(1),%v1(2)),:);
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%v1=[n,1]
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z = z(ones(%v1(1),%v1(2)),:);
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z = z(:);
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%v1=[1,k]
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z = matrix(z(:,ones(%v1(1),%v1(2))),n,k*nz);
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case 2 then
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t = (0:n+maxz+minz:(k-1)*(n+maxz+minz))';
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%v1=[nz,1]
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t = t(:,ones(%v1(1),%v1(2)));
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t = t(:)';
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%v1=[n,1]
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t = t(ones(%v1(1),%v1(2)),:);
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%v1=[k,1]
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z = z(ones(%v1(1),%v1(2)),:);
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z = z(:)';
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%v1=[n,1]
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z = z(ones(%v1(1),%v1(2)),:);
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end
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m = m+t+z;
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m = m+minz;
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x = x(:);
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x = x(m);
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return
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