nnls.m

matlab最优化工具箱

%NNLS Non-linear least squares
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%  x=nnls(a,b,tolerance) returns the best solution, in the least-squares sense, 
%  to the problem
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%  min |ax-b|^2  s.t.  x<=0
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%  The optional argument tolerance specifies how much x can deviate from zero.
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%  Copyright (c) 1994-1999 by MathTools, Ltd.
%  Built-in function.