Problem with GUI plotting

2013 9 22
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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?

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Azzi Abdelmalek
Azzi Abdelmalek 2013-9-22

0 个投票

add
hold(handles.axes1, 'on')

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Dimitris Arapidis
Dimitris Arapidis 2013-9-22
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
Azzi Abdelmalek 2013-9-22
I misunderstood your question
cla(handles.axes1)
plot....

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更多回答（1 个）

Image Analyst
Image Analyst 2013-9-22

0 个投票

Put
cla reset
before you plot the new line. Or else
hold off
would probably work too.

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