Problem with GUI plotting

I run a GUI where i enter values through edit boxes in order to take a plot, for example a simple line between A and B (i enter their coordinates through the boxes)

The function that plot the line is called from a push button.

I enter the A,B coordinates, press the button and get the plot with the line.

If, while still running the GUI, i enter a different value for A or B and press the button i get two lines in the plot.

What can i do so that when i press the button for a second time the first plot gets erased and the second plot is displayed alone?

Answer 1

[Azzi Abdelmalek]

add

hold(handles.axes1, 'on')

[Dimitris Arapidis]

it didn't work.

I have an axes, 2 edit boxes x1,x2 and the run button.

I use the following code on the run callback:

x1 = str2double(get(handles.x1,'String'));

x2 = str2double(get(handles.x2,'String'));

y1=1;

y2=2;

hold(handles.axes1, 'on')

plot([x1 x2],[y1 y2],'r')

guidata(hObject,handles);

strings are taged properly because i get the plots but they still overlap when i change x1,x2.

[Azzi Abdelmalek]

I misunderstood your question

cla(handles.axes1)
plot....

[Dimitris Arapidis]

thank you

Answer 2

[Image Analyst]

Put

cla reset

before you plot the new line. Or else

hold off

would probably work too.