How to change ax.View in app desginer?

Question

Dominik Müller 2021-1-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/715818-how-to-change-ax-view-in-app-desginer

评论： Dominik Müller 2021-1-13

Hi folks,

on my GUI im creating with App Designer I have an axes called app.UIAxes. And I have a drop down listing different viewing angles. What I want to do is the following:

By selecting a view I want to display on my axes, I enter a callback where I want to change app.UIAxes.View.

function changeView(app, event)
    chosenView = app.DropDown.Value;
    switch chosenView
        case 1
            view(app.UIAxes, [0 90]);
        case 2
            app.UIAxes.View = [30 30];
    end
end

As you can see I tried two different ways to change the view of the axes but none of them is changing anything. after the callback the view stays the same as befor, no changes... Why? What am I doing wrong?

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Answer 1

Dominik Müller 2021-1-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/715818-how-to-change-ax-view-in-app-desginer#answer_597093

在 MATLAB Online 中打开

Problem is solved:

If you enter items data it's stored as char. So therfor you have to cast from char to double or compare a string.

In my solution I cast a double out of char and then the switch-case works fine:

function changeView(app, event)
    chosenView = str2double(app.DropDown.Value);
    switch chosenView
        case 1
            view(app.UIAxes, [0 90]);
        case 2
            app.UIAxes.View = [30 30];
        case 3
            set(app.UIAxes, 'View', [90 0]);
    end
end

All three cases can be used to change the view!

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Cris LaPierre 2021-1-13

编辑：Cris LaPierre 2021-1-13

在 MATLAB Online 中打开

The value of a dropdown is a character array.

The other option is to make your case expressions character arrays

chosenView = app.DropDown.Value;
switch chosenView
    case '1'
        view(app.UIAxes, [0 90]);
    case '2'
        app.UIAxes.View = [30 30];
    case '3'
        set(app.UIAxes, 'View', [90 0]);
end