?? mpower.m
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function y = mpower(x,d)
%MPOWER (overloaded)
% Author Johan L鰂berg
% $Id: mpower.m,v 1.2 2006/08/11 11:48:15 joloef Exp $
%Sanity check
if prod(size(d))>1 | ~((fix(d) == d)) | ~(d>=0)
error('The power must be scalar.');
end
if x.dim(1)~=x.dim(2)
error('Matrix must be square.')
end
switch d
case 0
y = eye(x.dim(1),x.dim(2))^0;
case 1
y = x;
case 2
y = x * x;
otherwise
y = x*mpower(x,d-1);
end
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