replace.m

来自「国外专家做的求解LMI鲁棒控制的工具箱,可以相对高效的解决LMI问题」· M 代码 · 共 24 行

function F = replace(F,X,W)
%REPLACE        Substitutes variables in a SET object
%
%Z = REPLACE(F,X,W)  Replaces any occurence of the SDPVAR object Y 
%                    in the SDPVAR object X with the double W
%
% Example
%  x = sdpvar(1,1);
%  t = sdpvar(1,1);
%  F = set([1+t;1+x+t] > 0);
%  F = replace(F,x,2) generates F=set([1+t;3+t] > 0)

keep = [];
for i = 1:length(F.clauses)
    F.clauses{i}.data = replace(F.clauses{i}.data,X,W);
    if isempty(F.clauses{i}.data) | isa(F.clauses{i}.data,'double')
        keep(i)=0;
    else
        keep(i)=1;
    end
end

F.clauses = {F.clauses{find(keep)}};
F.LMIid = F.LMIid(find(keep));