options1=optimset('TolFun',1e-12,'MaxIter',1000);
x=0.01:0.01:0.8;
n=length(x);y0=2;y=zeros(1,n);
for i=1:n
y(i)=fsolve(@(y)testfun2(x(i),y),2);
end
plot(x,y,'r','linewidth',3);
xlabel('x','linewidth',6,'FontSize',18);ylabel('y','linewidth',6,'FontSize',18);
set(gca,'FontName','Times New Roman','FontSize',15);
title('{testfun_{2}}({x},{y}) = {0}','FontSize',15);
x,y
你在command window里面输入进去吧!!!x不能大于0.8,y没有解的!


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