codstock11.m

计算动力学系统的分岔图

disp('>>> global  x1 v1 s1 opt cds fpmds nsmds')
global  x1 v1 s1 opt cds fpmds nsmds
disp('>>> curve of fixed point <<< ')
disp('>>> p=[55;0.5;0.5;0.5;3;2;1];ap=7;')
p=[55;0.5;0.5;0.5;3;2;1];ap=7;
disp('>> opt = contset; ');
opt = contset;
disp('>> opt = contset(opt,''Multipliers'',1); ');
opt = contset(opt,'Multipliers',1);
opt = contset(opt,'Backward',0);
opt = contset(opt,'MaxNumPoints',500);
opt = contset(opt,'Singularities',1);
disp('>>> [x0,v0]=init_FPm_FPm(@NAFstock,[2.8213;1.01868], p, ap,1);')
[x0,v0]=init_FPm_FPm(@NAFstock,[2.8213;1.01868], p, ap,1);
disp('>>> [x1,v1,s1,h1,f1]=cont(@fixedpointmap,x0,[],opt);')
[x1,v1,s1,h1,f1]=cont(@fixedpointmap,x0,[],opt);
clc
disp('>>>> NS curve   starting in NSm >>>>>>')
disp('>>> xx2=x1(1:2,s1(2).index);p1=p;p1(fpmds.ActiveParams)=x1(3,s1(2).index); ')
xx2=x1(1:2,s1(2).index);p1=p;p1(fpmds.ActiveParams)=x1(3,s1(2).index);

opt=contset(opt,'MaxNumPoints',50);
opt=contset(opt,'Singularities',1);
opt = contset(opt,'Backward',0);
disp('>>> [x2,v2]=init_NSm_NSm(@NAFstock,xx2,p1,[4 7],1); ')
[x2,v2]=init_NSm_NSm(@NAFstock,xx2,p1,[4 7],1);
disp('>>> opt=contset(opt,''IgnoreSingularity'',[5]);  ')
opt=contset(opt,'IgnoreSingularity',[5]); 
disp('>>>[x31,v31,s31,h31,f31]=cont(@neimarksackermap,x2,[],opt);')
[x31,v31,s31,h31,f31]=cont(@neimarksackermap,x2,[],opt);
cpl(x31,v31,s31,[ 4 3 ]);