MATLAB: Am I unable to access application data for graphics objects created by using the copyobj function in MATLAB R2014b

MATLABr2014bgraphics

I have an axes which contains a surface plot. I assign application data to the axes object using the following command:

setappdata(axesHandle,'data',data)

I then copy the axes to another figure using the 'copyobj' function in the following way:

f = figure;

new_axes = copyobj(axesHandle,f);

In MATLAB R2014a, I the new axes in the new figure has the sample application data as the original axes, however in MATLAB R2014b the new axes does not have the same application data compared to the original axes. Why is that so?

Best Answer

Starting in R2014b, 'copyobj' does not copy callback properties or application data associated with graphics objects. The copied object has callbacks set to empty character arrays and application data set to empty structure arrays. Copies of objects might not behave as expected. For example, clicking a push button on the copy of a uicontrol has no effect.

If you want to create a copy of an object that has callbacks, then rerun the code used to create the first object to create a second object.

If you have existing code that uses 'copyobj' to copy callbacks, then you can use 'copyobj' with the 'legacy' option, for example,

c = copyobj(h,p,'legacy').

The behavior of the 'legacy' option is consistent with versions of MATLAB® before R2014b.

Related Solutions

MATLAB: How to get the object handle

The value of 'Children' properties are always object handles (usually in handle graphic numeric form), and are never strings.

Is 'axes_of_data' a variable name, or is it a field in your handles structure, or is it the Tag of the axes? (The last two could potentially be both true, especially if you are using GUIDE.)

If it is a Tag, then use

h = findobj(gcf, 'Tag', 'axes_of_data')

MATLAB: Does copyobj return an error when Copying Legends or Colorbars in MATLAB R2014b

Starting in MATLAB R2014b, legends and colorbars must be associated with an axes. If you want to copy a legend or a colorbar using copyobj, you also must copy the associated axes.

Copying a legend without the associated axes returns an error message. For example:

plot(rand(2))

l = legend('show'); % legend

ax = gca; % associated axes

fnew = figure; % new figure

copies = copyobj(l,fnew); % copy only legend to new figure

Error using matlab.graphics.illustration.Legend/connectCopyToTree (line 5)

A legend must be copied with its associated axes. Use a vector input with COPYOBJ in order to copy the legend and axes together.

You must copy both the legend and the associated axes.

 copies = copyobj([l,ax],fnew)
 2x1 graphics array:
   Legend    (data1, data2)
   Axes

Best Answer

Related Solutions

MATLAB: How to get the object handle

MATLAB: Does copyobj return an error when Copying Legends or Colorbars in MATLAB R2014b

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