:ֱ

ʽ:
[Line1 , Line2 , xy , Er] = FitTwoLines( x , y , n , x0_min , x0_max , x1 , y1)
[Line1 , Line2 , xy , Er] = FitTwoLines( x , y , n , x0_min , x0_max )
[Line1 , Line2 , xy , Er] = FitTwoLines( x , y , n , x0_min )
[Line1 , Line2 , xy , Er] = FitTwoLines( x , y , n)
[Line1 , Line2 , xy , Er] = FitTwoLines( x , y )

x :Ҫϵx
y :Ҫϵy
n :ҷֶĵĵȷ,ĬΪ1000,ڲֻĳЩЧ,ڲö̬ҵķʽ,
x0_min :ֱ߽λõ,ĬΪxСֵ
x0_max :ֱ߽λõ,ĬΪxֵ
x1 , y1:ʾֱ1Ƿ̶(x1,y1);ô,ʾָ

Line1صһ1*2ľ,ֱʾֱ1һϵ볣(a1,b1)
Line2صһ1*2ľ,ֱʾֱ2һϵ볣(a2,b2)
xy   صһ1*2ľ,ʾֱ1ֱ2Ľ(x0,y0)
Er   : ضĶۼ

:

x1 = -4:0.2:10;
y1 = x1;
x2 = 10:0.1:20;
y2 = 0.5*x2+5;

zx = [ x1,x2 ];
zy = [ y1,y2 ];

[line1,line2,xy,er]=fittwolines(zx,zy)//ʹвֱzx,zy,ִõĽ, y1 = 1*x1 + 0 ; y2 = 0.49999999999999*x2 + 5.00000000000016 ;ֱཻڵ(10,10)
line1 =
[ 1.00000000000000    0.00000000000000 ]
line2 =
[ 0.49999999999999    5.00000000000016 ]
xy =
[ 10.0000000000001    10.0000000000001 ]
er =
[ 1.0406968606E-25 ]