请问一下，matlab中报错：Warning: Trust-region-reflective method does not currently solve this type of problem, using active-set (line search) instead.> In fmincon at 422Optimization terminated: no feasible solution found. Magnitude of search direction less than 2*options.TolX but constraints are not satisfied.这是什么原因导致的。附原程序：（function f=fun9(x)f=-(15 -10*x(4) -0.5*x(5) -30*x(6) -50*x(7))*x(1)-(20-15*x(4)-0.8*x(5)-24*x(6)-45*x(7)) *x(2)-(16-18*x(4)-1.0*x(5)-20*x(6)-46*x(7)) *x(3);>> A=[10 15 18 0 0 0 0;0.5 0.8 1 0 0 0 0;30 24 20 0 0 0 0;50 45 46 0 0 0 0];b=[1000;80;2000;4000];>> vlb=[50 40 40 0 0 0 0];vub=[];x0=[50;40;40;0;0;0;0];>> [x,fval]=fmincon('fun9',x0,A,b,[],[],vlb,vub)
我做出来也是这个答案，但是由于x(4),x(5),x(6),x(7)是成本，所以不可能为零。
Warning: Trust-region-reflective algorithm does not solve this type of problem,using active-set algorithm. You could also try the interior-point algorithm:set the Algorithm option to 'interior-point' and rerun. > In fmincon at 460No feasible solution found.fmincon stopped because the size of the current search direction is less thantwice the default value of the step size tolerance but constraints were not satisfied to within the default value of the constraint tolerance.<stopping criteria details>x = 38.0249 28.0249 28.0249 0 0 0 0fval = -1.5793e+003警告时说明选择的算法不是太合理！
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