Multiplot Legend Item remains after line visible property put to "off"

Question

Jason 2024-6-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129576-multiplot-legend-item-remains-after-line-visible-property-put-to-off

编辑： Ayush Modi 2024-6-18

Hi, on a previous post I was kindly showed how to "disable a plot" on a set of plots. What I actually want to do is temporarily remove it and Steven Lord suggested using the "visible" parameter

So I use a checkbox to allow me to toggle on or off the last line plotted:

            val = app.VisibleOFFlastplotCheckBox.Value;
            ax=app.UIAxes;
            t = ax.Children(1);     % Get last plot
            switch val
                case 1                  
                   t.Visible='off';                     
                case 0                      
                     t.Visible='on';                   
            end

Whilst this works, it doesn't seem to remove the legend item, but instead Greys it out.

So to show this, the purple curve below is the one I want to remove / hide (note if remove it, I want the possibility of adding it back which is why Steven suggested the "visible" approach)

And here's what happens once I set the visible property of the line to "off" - notice the legen item is still present

So how can I hide / temporarily remove the last legend item?

Thanks

Jason

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Aquatris 2024-6-18

By any chance does 't' has 'HandleVisibility' property? if so try to set that to off.

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Answer 1

Jaynik 2024-6-18

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Hi Jason,

Instead of just using the Visible property, you can set the IconDisplayStyle property of the Annotation object to 'off'. Here is how you can adjust the code accordingly:

switch val
    case 0
        t.Visible = 'off';
        t.Annotation.LegendInformation.IconDisplayStyle = 'off';
    case 1
        t.Visible = 'on';
        t.Annotation.LegendInformation.IconDisplayStyle = 'on';
end

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Jason 2024-6-18

Perfect, thankyou!

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Answer 2

Ayush Modi 2024-6-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129576-multiplot-legend-item-remains-after-line-visible-property-put-to-off#answer_1473541

编辑：Ayush Modi 2024-6-18

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Hi Jason,

From the previous post, I understand you are using the 'DisplayName' property in the plot function and passing the plot handles in the legend function.

f1 = figure;

a = plot(2:10,3:11, 'DisplayName','legend1');

% Current legend statement - passing plot handles

legend(a);

a.HandleVisibility = "off";

a.Visible = 'off';

As depicted, 'HandleVisibility' property doesn't hide the legend line in this implementation. As a workaround, you can enable legends visibility using 'show' parameter. Here is the example code for your reference:

f2 = figure;

b = plot(2:10,3:11, 'DisplayName','legend2');

% Setting the legend property to show.

legend show;

b.HandleVisibility = "off";

b.Visible = 'off';

Hope this helps!