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

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.

Answer 1

[Walter Roberson]

                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

[Arun Sharma]

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.