MATLAB: Change line type when figure handle is known

figure childred

I have created a plot in a figure window. I want to change the line type to circles.

I know the figure handle. Let's say it's gcf. Can I use this to modify the plot or line? I figure they are children of the figure so I should be able to use

set(gcf, child:plot, child:line, 'o')

… something along those lines. I'm a newbie. How should this look?

Best Answer

Does that do what you want?

t = 0:0.1:10;
y = sin(t);
h = plot(t,y);
set(h,'Marker','o');
set(h,'LineStyle','none');

Arnaud

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The lineseries will (generally) be a child of the axes. So if you have a have a handle to the axes (or using gca, if it is the current axes), you can query its Children property:

>> a = axes;
>> h1 = plot(1:10);
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>> h1 == h2
ans =
       1

If you have a very complicated scene (perhaps there are multiple axes involved or maybe hggroups and hgtransforms), it may be easier to use the findobj command:

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I figured it out. Seems I only need to set the marker of the children in the plot. The Code I used

 % --- Executes on selection change in lines_or_points.
 function lines_or_points_Callback(hObject, eventdata, handles)
 all_child_handles_axes_eis=get(handles.axes_eis,'Children');
 all_child_handles_axes_drt=get(handles.axes_drt,'Children');
 switch get(handles.lines_or_points, 'Value');
    case 1 %LINES
        set(all_child_handles_axes_eis(1:end), 'Marker', 'none')
        set(all_child_handles_axes_drt(1:end), 'Marker', 'none')
    case 2 %POINTS
        set(all_child_handles_axes_eis(1:end), 'Marker', '.')
        set(all_child_handles_axes_drt(1:end), 'Marker', '.')
end

Best Answer

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