MATLAB: “Restore View” limits come from… where

MATLABplotzoom

I'm having some difficulty with a plot in Matlab 2018b. After plotting the data, I select the "Zoom In" option from the axes menu on the top-right, and zoom in and out to inspect the data. I later select "Restore View" from the context menu available when using "Zoom In", expecting it to go back to what it was after I plotted the data. However, I end up with a blank white axes with XLim [0 1]. (Legitimate X limits would be along the lines of [7.3705e+05 7.3740e+05].) Manually setting the X limits reveals that my data plots are still there, but well out of view.

My question is: Where is Matlab getting the limits that should be used when performing "Restore View"?

If needed, here's some more detailed information:

I am using a stack of two axes, directly overlaid on top of each other, inside of a graphics panel. The two axes are linked on the X-axis ("linkaxes([a,b],'x');"). The "upper" axes are set to have no background color, and "PickableParts" has been set to none.

Best Answer

Look in zoom.m function getbounds(), about line 1074. It is axes appdata zoom_zomOrigAxesLimits that it pulls out to make sure you do not zoom out too far.

With you having two axes, then I would worry about the expected axes being the active axes.

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MATLAB: (App Designer) How to link axes of UIAxes components to enable user to zoom all plots together in AppDesigner 2018b

Hi Deniz,

As per knowledge, I don't how to do link them simultaneously. However, we may play small trick.

I have attached small sample hereby (.m file, since .mlapp is not accepted here, I copy the code and paste in .m file)

Idea : Enable Zoom for both axes in startup function, then use keypress callback function to reset another axes when one of the axes changes due to zoom

[However, from method above, user have to pressing one of the keyboard button when zooming the plot]

Step 1: Create Variables to store original XLim of both axes

    properties (Access = private)
        a % Description
        b
        end

Step 2 : Enable zoom for the both axes in startup function

zoom(app.UIAxes,'on')
zoom(app.UIAxes2,'on')

Step 3: Record the Xlim of axes after plotting them. In my attached, i do it in startup function

plot(app.UIAxes,[0 1],[0 1]);
plot(app.UIAxes2,[0 0.2 1],[0 0.9 1]);
app.a = app.UIAxes.Xlim;
app.b = app.UIAxes2.Xlim;

Step 4 :Use keyPress function to detect the changes of one axes, then it will change the xlimit and ylimit for another axes.

function UIFigureKeyPress(app, event)
            key = event.Key;
            if app.UIAxes.XLim ~= app.a
                app.UIAxes2.XLim = app.UIAxes.XLim;
                app.UIAxes2.YLim = app.UIAxes.YLim;
            elseif app.UIAxes2.XLim ~=app.b
                app.UIAxes.XLim = app.UIAxes2.XLim;
                app.UIAxes.YLim = app.UIAxes2.YLim;
            end       
            
end

You may try to run my .m script to get the idea, when you wana zoom it and enable another axes to have same x&y limit, you must press one of the button in the keyboard.

I hope my workaround solution help you.

MATLAB: Tool tip bug in App Designer

Hi,

The concerned teams have been informed of this issue in tooltips. They might be looking into it for the upcoming releases.

Hope this helps!

Best Answer

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MATLAB: (App Designer) How to link axes of UIAxes components to enable user to zoom all plots together in AppDesigner 2018b

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