Is there anyway to modify a matlab app component to fit my needs?

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Paulo 2024-5-22

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评论： Paulo 2024-5-22

I need a compass-like component for my application. The "Heading Indicator" component almost fits my needs but I would need to modify it. I would need a different icon that is not a plane and I would need said indicator to rotate instead of the coordinates.

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Answer 1

Venkat Siddarth Reddy 2024-5-22

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编辑：Venkat Siddarth Reddy 2024-5-22

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Hi Paulo,

I don't think you can change the icon of the "heading indicator" since this is a component in Aerospace Toolbox for displaying measurements for "aircraft heading (in degrees)".

However, if you are looking for a compass with pointer as the icon, then I think you can checkout the compass feature of MATLAB:

u = [5 3 -4 -3 5];

v = [1 5 3 -2 -6];

compass(u,v)

compass(U,V) plots arrows originating from the point (0, 0). Specify the direction of arrows using the Cartesian coordinates U and V, with U indicating the x-coordinates and V indicating the y-coordinates.

To learn more about the compass function,please refer to the following documentation:

https://www.mathworks.com/help/matlab/ref/compass.html

Hope it helps!

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Paulo 2024-5-22

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I already tried that solution but couldn't remove the degree labels in app designer.

            theta=angle*pi/180;
            r = 3; % magnitude (length) of arrow to plot
            x = 4; y = 5;
            u = r * cos(theta); % convert polar (theta,r) to cartesian
            v = r * sin(theta);
            c=compass(app.UIAxes,u,v,'g');
            c.LineWidth=2;
            set(findall(gcf,'String','120','-or','String','30','-or','String','60','-or','String','60','-or','String','150','-or','String','210','-or','String','240','-or','String','300','-or','String','330','-or','String','  2','-or','String','  3','-or','String','  1'),'String',' ')
            set(findall(gcf,'String','90'),'String','North')
            set(findall(gcf,'String','180'),'String','West')
            set(findall(gcf,'String','270'),'String','South')
            set(findall(gcf,'String','0'),'String','East')