Want to plot in my existing axes of GUI and then delete it.

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Arun Sharma
Arun Sharma 2016-2-28
编辑： Walter Roberson 2016-2-29
Hello Everyone
I am trying to build a GUI that will display data coming from serial port. Posting whole code will create confusion, so i am posting the relevant part.
I created a axes in GUI and then update it, based on the data coming from the serial port it has to be updated again and then i have to delete some part.
Here is the code
set(handles.plot_vector(Angle),'XData',[x0,x]);
set(handles.plot_vector(Angle),'YData',[y0,y]);
% m = handles.plot_vector(Angle);
% set(m,'XData',[x0,0],'Color','Red','LineWidth',3);
% set(m,'YData',[y0,0],'Color','Red','LineWidth',3);
axes(handles.axes1)
m = plot([0,x0],[0,y0],'r','LineWidth',3);
drawnow
delete(m);
Actually i have to draw a straight line based on the Angle value coming from the Serial Port, so i used the following command and then have to delete this.
m = plot([0,x0],[0,y0],'r','LineWidth',3);
But the above line opens a new figure, but i have to do this thing on same axes.
I tried this
% m = handles.plot_vector(Angle);
% set(m,'XData',[x0,0],'Color','Red','LineWidth',3);
% set(m,'YData',[y0,0],'Color','Red','LineWidth',3);
This plots the line on axes but i don't know how to delete only this part.
Actually i am trying to display UltraSonic data in the form of radar in MATLAB GUI, So it will look like scanning, but stuck with this, hope someone helps me.

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采纳的回答

Walter Roberson
Walter Roberson 2016-2-28
m = plot(handles.axes1, [0,x0], [0,y0], 'r', 'LineWidth', 3);
drawnow
delete(m);
Since you are doing this repeatedly it would be better to create a line at the beginning and update it as you go along.
m = plot(handles.axes1, nan, nan, 'r', 'LineWidth', 3);
while true
...
set(m, 'XData', [0 x0], 'YData', [0 y0]);
drawnow();
...
end
delete(m); %when we are done with drawing lines
  1 个评论
Arun Sharma
Arun Sharma 2016-2-29
编辑：Walter Roberson 2016-2-29
Thanks.
Actually i was easy, i just need this.
set(handles.plot_vector(Angle),'XData',[x0,x]);
set(handles.plot_vector(Angle),'YData',[y0,y]);
scanner = plot(handles.axes1,[0,x0],[0,y0],'r','LineWidth',3);
drawnow
delete(scanner);
Actually plot(handles.axes1,...) works for me.
Thanks for your help.

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