How do I add a listener for an implicit change of limits on an axis

I have a plot with two sets of axes. One set shows latitude/longitude, and the other shows a local X-Y coordinate system. When the bounds of the plot change, I want to update the limits of the second (lat/lon) axes to match the first pair of axes.

I have added this line:

 addlistener(xyAxes, {'XLim', 'YLim'}, 'PostSet', @(hAxes, eventData) syncAxes());

The plotting code (which I inherited) is similar to this:

    function testListener

    close(77);
    figure(77)

    xyAxes = gca;
    addlistener(xyAxes, {'XLim', 'YLim'}, 'PostSet', @(hAxes, eventData) ...
                fprintf('Listener called\n'));

    XY.plots.p = plot(xyAxes, 0,0, 'x', 'LineWidth', 2, 'MarkerSize', 20);
    XY.plots.x = 2;
    XY.plots.y = 3;

    set(XY.plots.p, 'XData', XY.plots.x, 'YData', XY.plots.y);

    fprintf('Set data %f %f\n', get(xyAxes, 'XLim'));

    pause;

    XY.plots.x = [ XY.plots.x 5 ];
    XY.plots.y = [ XY.plots.y 4 ];

    set(XY.plots.p, 'XData',XY.plots.x, 'YData',XY.plots.y);

    fprintf('Set data, plot is updated %f %f\n', get(xyAxes, 'XLim'));
    pause;

    set(xyAxes, 'XLim', get(xyAxes, 'XLim'));

    fprintf('Manually set XLim property %f %f\n', get(xyAxes, 'XLim'));
    pause;

    xlim(xyAxes, get(xyAxes, 'XLim'));

    fprintf('Called XLim %f %f\n', get(xyAxes, 'XLim'));

When I run the above code, I get this output:

 >> testListener
 Set data 1.000000 3.000000
 Set data, plot is updated 2.000000 5.000000
 Listener called
 Manually set XLim property 2.000000 5.000000
 Listener called
 Called XLim 2.000000 5.000000

When I explicitly set the bounds on the axis, then the listener is called. However, when I change the data, which implicitly changes the bounds, the listener is not called.

What do I need to do to have the listener be called for the implicit change?

Answer 1

[Walter Roberson]

Use linkaxes()

[Troy Daniels]

I have one plot with two axes, showing different scales. Unless I have missed something, linkaxes is for two plots with the same scales.

Answer 2

[Serge]

Here is a simple example that updates the time axis on two linked plots every time you zoom/pan:

ax(1)=subplot(211); plot(rand(5));
ax(2)=subplot(212); plot(rand(5));
linkaxes(ax,'x') %link axis extents
addlistener(ax,'XLim','PostSet',@(~,e)datetick(e.AffectedObject,'x','keeplimits')); %self updating time axis