How to freeze the range of y-axis on an axes on gui?

I am trying to plot the time audio signal using plot(handles.axes1, x) which works fine. The problem is that I cannot make the make the range of a y-axis fix at [-1 1]. I try to set the YLim to be [-1, 1], and YLimMode to be 'manual' both in property windows settings using gui and also in callcall back

Answer 1

[Dario Mangoni]

Currently (at R2018b) this operation is made easy through 'axis manual' command.

figure;
hold on;
plot(1,1,'+')
plot(2,2,'+')
axis manual
plot(50,50,'+')

The point (50,50) is not in view because axis limits has been retained.

See axis documentation for more options.

Answer 2

[Matt J]

It is not enough to set YLimMode to 'manual'. You need to apply "hold on" as Geoff mentioned. However, you can still use CLA to clear the plot between re-renderings, like in the example below.

    axis([0,11,-1,1]);
    h=gca;

    hold on
    h.YLimMode='manual';
    for i=1:100, 

       plot(1:10,rand(1,10));

       pause(.3); 
       drawnow
       cla
    end
    hold off

Answer 3

[Geoff Hayes]

Try using ylim which will allow you to set the y-axis limits. In your case, you could do something like

 ylim(handles.axes1,[-1 1]);

In order to keep these limits, you may need to call

 hold(handles.axes1,'on');

so that you return the current properties of the axes before a new plot is added to it.

[MatlabNewbie01232015]

Thank for helping me out. The problem is the plot becomes a mess because I try to display the output of an audio file segment by segment. Is there anyway I can clear what on the plot but still keep the axes' range?

[Geoff Hayes]

Why not just replace the x and y data from the previous segment? Something like

 % plot the first segment
 h = plot(x,y);

 % use the handle from plot, h, to update with the new segment data
 set(h,'XData',xNewSeg,'YData',yNewSeg);

where xNewSeg and yNewSeg are the x and y data from the new segment.