非常感谢！不过，y2的范围是-1*(10^6),7*(10^6),但是不等分:(
把y1的范围调成0.4:0.2:5.8也有28个元素，然后y2也有28个元素，但是不等分，是个曲线，而且，这个曲线的值与y1是有关的。
数据见附件
syms density
e_w=0.7;
alpha=0.5;
e_f=0.07;
fare=1.8;
f_bar=0.6;
e_t=0.35;
beta=0.0083;
maxdensity=5000;
densityzero=1250;
headway=0.125;
e_a=0.7;
miu_0=100;
miu_1=540;
kesi=2;
T_0=0.05;
gama_0=50;
gama_1=280;
k_0=100;
k_1=500;
v_t=40;
x=0.4;
BIGN=1;
s=2;
demand=0;
pai0=[];
k=0.4;
in=0.03;
r=0.01;
pai=0;
%BOT
% profit maximization
% flat fare
for BIGN=1:28
for t=1:20
density=maxdensity/(1+(maxdensity/densityzero-1)*exp(-k*t));
end
demand=(1-e_w*alpha*headway-e_f*fare-e_t*BIGN*(x/v_t+beta))*density*x*0.5-e_a*density*x*x/8.0;
while s<=BIGN
demand=demand+(1-e_w*alpha*headway-e_f*fare-e_t*(BIGN+1-s)*(x/v_t+beta))*density*x-e_a*density*x*x/4.0;
s=s+1;
end
s=2;
BIGN;
%t
for t=1:20
pai=pai+fare*demand/((1+in)^(t-1))-(miu_0+miu_1*(kesi*T_0+2*BIGN*x/v_t+2*beta*BIGN)/headway)/((1+in)^(t-1))-(gama_0/((1+in)^(t-1))+gama_1*x*BIGN*((1+r)^(t-1)))-(k_0*((1+r)^(t-1))+k_1*(BIGN+1)/((1+in)^(t-1)))
end
BIGN=BIGN+1;
pai0=[pai0,pai];
end
plotyy(1:28,0.4:0.2:2.0,1:28,pai0,'plot')
忘记下载要m币了 粘上边了 附件不要看了
[本帖最后由 stunk 于 2010-8-30 17:41 编辑]
2010-8-30 17:39 上传
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