Matlab 2025 axes zoom error when the x axis is scaled differently.

Hi all,

When I run this code on matlab 2025a, both plots look the same. However, when I use the zoom tool (by just clicking somewhere in the middle of the plot), then the axis line of the right plot displays over everything else.

% make bad graph
a = randn(1,1000);
fs = 5e7;

figure
tiledlayout(1, 2);

nexttile;
plot( a);

nexttile;
t = (0:length(a) - 1)/fs;
plot( t, a);

Here is a screenshot:

Notice the line spilling onto the y-axis on only the right plot, but the left plot is properly cropped after zooming.

[dpb]

Submit this to Mathworks as an official support request/bug at <Product Support Page>

[Jay]

@dpb Done. Thanks!

Answer 1

[Jay]

Okay, I reported the bug. But for others with the same problems, here is a workaround that adds listeners and crops the data appropriatly (the way that it should work when built in):

% make bad graph
a = randn(1,1000);
fs = 5e7;

figure
tiledlayout(1, 2);

nexttile;
plot( a);

ax = nexttile;
t = (0:length(a) - 1)/fs;
h = plot( t, a);

% Store original data
h.UserData.originalX = h.XData;
h.UserData.originalY = h.YData;

% Add listener for zoom and pan
addlistener(ax, 'XLim', 'PostSet', @(~,~) cropLineToAxes(ax, h));
addlistener(ax, 'View', 'PostSet', @(~,~) resetData(ax, h));

function cropLineToAxes(ax, h)
    % Get original data
    x = h.UserData.originalX;
    y = h.UserData.originalY;

    % Current axis limits
    xlim = ax.XLim;

    % Logical mask to keep only visible points
    mask = x >= xlim(1) & x <= xlim(2);

    % Apply the mask
    h.XData = x(mask);
    h.YData = y(mask);
end

function resetData(ax, h)
    % Get original data
    x = h.UserData.originalX;
    y = h.UserData.originalY;

    % Set it
    h.XData = x;
    h.YData = y;

    % reset the figure
    zoom(ax, 'out')
end