Question

为什么我的matlab程序出不了图，但是数据输出是对的

clear
x_t=28;
x_0=0;
y_0=0;
y_n=0;
y_t=0;
for x_n=0:100
R_ref=sqrt((x_0-x_t)^2+(y_0-y_t)^2);
R_n=sqrt((x_n-x_t)^2+(y_n-y_t)^2);
d=R_n-R_ref;
end

plot(x_n,d)

grid on
axis([0,100,-30,50])
xlabel('x axis'), ylabel('Distance difference(cm)')
title('2D distance difference diagram')
hold off

Answer 1

你的x_n在执行完for循环后为一个点，值为100
d也是一个点，结果是44，
所以你肯定画不出图，充其量是一个点

Answer 2

clear
x_t=28;
x_0=0;
y_0=0;
y_t=0;
x_n=0:100;
y_n=x_n;
R_ref=sqrt((x_0-x_t).^2+(y_0-y_t).^2);
R_n=sqrt((x_n-x_t).^2+(y_n-y_t).^2);
d=R_n-R_ref;
plot(x_n,d)
grid on
axis([0,100,-30,50])
xlabel('x axis'), ylabel('Distance difference(cm)')
title('2D distance difference diagram')

按上面语句试试

Answer 3

clear
x_t=28;
x_0=0;
y_0=0;
y_n=0;
y_t=0;
for x_n=0:100       
 R_ref=sqrt((x_0-x_t)^2+(y_0-y_t)^2);
 R_n=sqrt((x_n-x_t)^2+(y_n-y_t)^2);
 d(x_n+1)=R_n-R_ref; 
end
plot(0:100,d)   
grid on
axis([0,100,-30,50])
xlabel('x axis'), ylabel('Distance difference(cm)')
title('2D distance difference diagram')
hold off