# Copying the content of a Figure to another Figure

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Hi,

I am trying to copy the directivity pattern of an antenna array from the figure generated by the pattern command to another window but so far did not manage to do that.

I am using copyobj command but it does not work. Here is the code that I am executing to achieve this goal:

fc = 60.48e9; % Carrier Frequency in Hz.

numElements = 16; % Number of antenna elements.

prop = physconst('LightSpeed');

lambda = prop/fc;

% ULA Antenne Array Creation.

array = phased.ULA(numElements, lambda/2);

f1 = figure();

pattern(array, fc, -180:180, 0, 'PropagationSpeed',prop,...

'CoordinateSystem', 'polar',...

'Type', 'powerdb', 'Normalize', true);

ax1 = gca;

f2 = figure();

ax = axes;

ax2 = copyobj(ax1,ax);

I am doing that because I did not manage to find a way to solve the problem listed in this Question. Using the method above, I will copy the content of the figure to a polaraxes in UIFigure in Matlab App Designer.

Any solution to one of the mentioned problems is highly appreciated.

##### 4 Comments

Adam Danz
on 12 Feb 2019

### Accepted Answer

Adam Danz
on 12 Feb 2019

Edited: Adam Danz
on 13 Feb 2019

The function copyobj(h,p) copies objects listed in h to a new parent, p. When your code is run, the error message indicates, "Axes cannot be a child of Axes." This is because you cannot assign one axis as a child to another axis. Rather, you should copy the axis to a new figure.

Here's the correct way to do that:

f2 = figure();

ax2 = copyobj(ax1,f2);

[UPDATE]

To copy objects from one set of axes to another, you must first get handles to all of the axis children and then copy that list of handles to an existing axis. Here's a demo that follows the code in your question.

% Get handles for all children from ax1

ax1Chil = ax1.Children;

% Copy all ax1 objects to axis 2

copyobj(ax1Chil, ax2)

In your case, even though the axes you're copying from are polar axes, the data are actually plotted in Cartesian coordinates. So you'll copy the objects to a cartesian plot (middle figure below).

ax1Chil = ax1.Children;

figure;

ax2 = axes;

copyobj(ax1Chil, ax2)

axis equal

rectangle('Position', [-50 -50, 100, 100], 'Curvature', [1,1]) %Example: add circle

If you add the object to a polar axis, the (x,y) coordinates create a completely different pattern (right figure below).

ax1Chil = ax1.Children;

figure;

ax2 = polaraxes('ThetaTick', -150:30:180, 'ThetaLim', [-180, 180]);

copyobj(ax1Chil, ax2)

The image below shows [original, Cartesian axes, polar axes].

##### 8 Comments

Walter Roberson
on 14 Feb 2019

right because it is cartesian data , the polar plot converted to cartesian already .

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