facing error in running it. please rectify

h b
2017 1 16
2 个回答
更新时间：2021 8 20
1 次查看（30 天）

0 个投票

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

回答（2 个）

Walter Roberson
Walter Roberson 2017-1-16

1 个投票

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 2017-1-16
编辑：h b 2017-1-16
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];
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));
DELAY = 0;
pause(DELAY);
drawnow
end
h b
h b 2017-1-16
i included. still showing error
Walter Roberson
Walter Roberson 2017-1-16
No error message shows up. The code appears to be doing what it was designed to do. However, I suspect you would find the plot more interesting if you were to add
hold on
after
plot(x888,y888,'b')
h b
h b 2017-1-18
thank you. i also want the pointers to enter-one after the other, with the time (gap)between their entry specified as per the user input. help
Walter Roberson
Walter Roberson 2017-1-18
Which are the "pointers" ? Which variable holds the time gaps? Should the time gap be understood to be in terms of indices, or is it related to x values?
h b
h b 2017-1-20
编辑：h b 2017-1-20
Here, in the above code.
%execution one
for n = 1:180
-----
end
%execution 2
for n = 1:180
-----
end
Here, the execution 2 runs only after the execution 1 ends. i want, once the execution 1 is running, execution 2 should also start in a time difference given as input. ( time difference- difference in the start of both executions given as user-input in seconds)
Also In matlab, how to change the pointer/marker size to a square of dimension 1m* 2m moving in the path defined by the above code?
thanks in advance
Walter Roberson
Walter Roberson 2017-1-20
You appear to be looking at different "above code" than I am. Please link to the code, or post it if it turns out not to be already posted.
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

0 个投票

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
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h b
h b 2017-1-16
i edited, this is the final , still showing error
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];
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));
DELAY = 0;
pause(DELAY);
drawnow
end
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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h b
2017-1-16

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