?? unvec.m
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function V = unvec(v,n)% function V = unvec(v,n)%% form matrix V from col vector v, where V has n columns.% If n is not specified, V is made square[m,N] = size(v);if (nargin == 1), n = sqrt(m);endm = m/n;V = zeros(m,n);for i = 0:n-1, V(:,i+1) = v(i*m+1:i*m+m);end?? 快捷鍵說明
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