data=load('C:\Documents and Settings\Administrator\桌面\制动力\111.txt');k1=data(1,:);k2=data(2,:);k3=data(3,:);k4=data(4,:);k5=data(5,:);k6=data(6,:);k7=data(7,:);k8=data(8,:);k9=data(9,:);k10=data(10,:);k11=data(11,:);k12=data(12,:);k13=data(13,:);k14=data(14,:);k15=data(15,:);k16=data(16,:);k17=data(17,:);k18=data(18,:);k19=data(19,:);k20=data(20,:);b=-46777.25;d=117440.76;x=0:100:150000;
y1=k1*x+b;
y2=k2*x+b;
y3=k3*x+b;
y4=k4*x+b;
y5=k5*x+b;
y6=k6*x+b;
y7=k7*x+b;
y8=k8*x+b;
y9=k9*x+b;
y10=k10*x+b;
y11=k11*x-k11*d;
y12=k12*x-k12*d;
y13=k13*x-k13*d;
y14=k14*x-k14*d;
y15=k15*x-k15*d;
y16=k16*x-k16*d;
y17=k17*x-k17*d;
y18=k18*x-k18*d;
y19=k19*x-k19*d;
y20=k20*x-k20*d;
plot(x,y1,x,y2,x,y3,x,y4,x,y5,x,y6,x,y7,x,y8,x,y9,x,y10,x,y11,x,y12,x,y13,x,y14,x,y15,x,y16,x,y17,x,y18,x,y19,x,y20);
axis([0 120000 -55000 25000 ])
这是我画出 r f 曲线用到的 然后求出每两条的交点 然后再连起来应该怎么写? |