MATLAB: Hover mouse over a complex number

MATLABscript

How can I set the display of value of a complex number to polar form when hover mouse over it in script. Is there any setting or preference to let me do this?

Best Answer

I can’t find phasor format as an option for the Tooltips. Tooltip format appears to be defined by default, and with the exception of following the setting of the format function, not customizable.

Related Solutions

MATLAB: How to disable the ZOOM context menu in MATLAB 7.6 (R2008a)

To control the behavior of a right-click action when ZOOM is active change the property ‘rightclickaction’ of the zoom mode object.

A value of 'InverseZoom' causes a right-click to zoom out.

h=zoom(gcf);
set(h,'rightclickaction','InverseZoom');

MATLAB: Reading mouse position while hovering

Ive - I think part of the problem is that you are creating a new textHdl object each time the hoverCallback fires....which will be every time that you move the mouse. So you will never be able to hide the original text object that you created, since you have created another again and again.

This variable needs only to be defined once outside of the callback. You can then adjust the string contents as you move the mouse around the axes. For example,

 function pixHover(x,y)
     Thresh = 40;
     set(gcf,'WindowButtonMotionFcn', @hoverCallback);
     axesHdl = axes;
     textHdl = text('Color', 'black', 'VerticalAlign', 'Bottom');
     function hoverCallback(src, evt)
        mousePoint = get(axesHdl, 'CurrentPoint');
        mouseX = mousePoint(1,1);
        mouseY = mousePoint(1,2);
        distancesToMouse = hypot(x - mouseX, y - mouseY);
        [~, ind] = min(abs(distancesToMouse));
        xrange = range(get(axesHdl, 'Xlim'));
        yrange = range(get(axesHdl, 'Ylim'));
        if abs(mouseX - x(ind)) < Thresh && abs(mouseY - y(ind)) < Thresh
            set(textHdl, 'String', {['x = ', num2str(x(ind))], ['y = ', num2str(y(ind))]});
            set(textHdl, 'Position', [x(ind) + 0.01*xrange, y(ind) + 0.01*yrange])
        else
            set(textHdl, 'String', '')
        end
    end
 end

Since hoverCallback is nested within the pixHover (parent) function, then it has access to the local variables defined there. This includes the handle to the text object, textHdl. As the mouse moves, if we find that the threshold is met for one of the (x,y) pairs, then we just update the String and Position for textHdl. Else, we just set the string to be empty which "hides" it from us. (I suppose we could just manipulate the Visible property instead to explicitly hide the text object.)

Try the above and see what happens!

Best Answer

Related Solutions

MATLAB: How to disable the ZOOM context menu in MATLAB 7.6 (R2008a)

MATLAB: Reading mouse position while hovering

Related Question