programe_fit.m

曲线拟合的程序

%%fit_file
bspline5;
x=wang(:,1);
y=wang(:,2);
%z=wang(:,3);
polyfit(x,y,3);
%polyfit(x,z,6);

fit_y=polyval(x,y,3);
%fit_z=polyval(x,z,6);


figure;
plot(x,y);
hold on ;
plot(x,fit_y,'r');
grid;
%figure;
%plot(x,z);
%hold on 
%plot(x,fit_z,'r');
%grid;
figure;
plot3(x,y,z);
hold on ;
plot3(x,fit_y,z,'r');
grid;