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facing error in running it. please rectify

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h b
h b 2017-1-16
关闭： MATLAB Answer Bot 2021-8-20
x8d=linspace(150,110,180)
y8d=linspace(69,69,180)
%r6=24
xc = 75;
yc = 69;
r1=21
theta1 = linspace(0,-pi,180);
x1d = r1*cos(theta1) + xc;
y1d = r1*sin(theta1) + yc;
plot(x888,y888,'b')
h8 = plot(x888(1),y888(1),'bs','MarkerSize',7,'MarkerFaceColor','r');
for n = 1:180
set(h8, 'XData', x888(n), 'YData', y888(n));
end

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回答（2 个）

Walter Roberson
Walter Roberson 2017-1-16
Undefined function or variable 'x888'.
Well, that makes sense: you define x8d and y8d but not x888 or y888.
By the way, in your loop
for n = 1:180
set(h8, 'XData', x888(n), 'YData', y888(n));
end
you should add a
drawnow()
after the set()
  10 个评论
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h b
h b 2017-1-20
x8d=linspace(150,110,180)
y8d=linspace(69,69,180)
%r6=24
xc8 = 75;
yc8 = 69;
r1=21
theta11 = linspace(0,-pi,180);
x8c = r1*cos(theta11) + xc8;
y8c = r1*sin(theta11) + yc8;
x8b=linspace(40,0,180)
y8b=linspace(69,69,180)
x888=[ x8d x8c x8b];
y888=[ y8d y8c y8b];
h8 =plot(x888(1),y888(1),'bs','MarkerSize',7,'MarkerFaceColor','r');
h9= plot(x888(1),y888(1),'bs','MarkerSize',7,'MarkerFaceColor','b');
for n = 1:180
set(h8, 'XData', x888(n), 'YData', y888(n));
DELAY = 0;
pause(DELAY);
drawnow
end
for n = 1:180
set(h9, 'XData', x888(n), 'YData', y888(n));
DELAY = 0;
pause(DELAY);
drawnow
end
h b
h b 2017-1-20
1.here how to change the pointer shape to a rectangular object having 1m*2m dimension. 2. execution 2 to begin within a time difference specified by the user
KSSV
KSSV 2017-1-16
编辑：KSSV 2017-1-16
clc ;clear all
x8d=linspace(150,110,180)
y8d=linspace(69,69,180)
%r6=24
xc = 75;
yc = 69;
r1=21
theta1 = linspace(0,-pi,180);
x888 = r1*cos(theta1) + xc;
y888 = r1*sin(theta1) + yc;
plot(x888,y888,'b')
h8 = plot(x888(1),y888(1),'bs','MarkerSize',7,'MarkerFaceColor','r');
for n = 1:180
set(h8, 'XData', x888(n), 'YData', y888(n));
drawnow
hold on
end
  3 个评论
显示 1更早的评论
Image Analyst
Image Analyst 2017-1-16
There is no error when I ran it. If there is, then copy and paste all the red text back here.
h b
h b 2017-1-18
thanks. no error. i want the pointers to enter-one after the other, with the time (gap)between their entry specified as per the user input.

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