Label rows and columns of subplots

I have six figures (in .fig format) and would like to arrange them in a 2x3 subplot and then label each row and column of subplots. In specific, I want to label the two rows 'Participant 1' and 'Participant 2', and the three columns 'Frequency set 1', 'Frequency set 2' and 'Frequency set 3'.

Below is the code I tried:

% give the path of .fig to be plotted together
figName1 = '/.../participant1/freqSet1.fig';
figName2 = '/.../participant1/freqSet2.fig';
figName3 = '/.../participant1/freqSet3.fig';
figName4 = '/.../participant2/freqSet1.fig';
figName5 = '/.../participant2/freqSet2.fig';
figName6 = '/.../participant2/freqSet3.fig';

% list all variables starting w/ 'figName'
figList = who('figName*'); 

% Load saved figures
fig1=hgload(figName1);
fig2=hgload(figName2);
fig3=hgload(figName3);
fig4=hgload(figName4);
fig5=hgload(figName5);
fig6=hgload(figName6);

% Prepare subplots
figure
for iSubPlot = 1:length(figList)
    
    h(iSubPlot) = subplot(2,3,iSubPlot);
    
    if iSubPlot==1
        text(-0.35, 0.5,'Participant 1');
        text(0.35,1.1,'Frequency set 1');
    
    elseif iSubPlot==2
        text(0.35,1.1,'Frequency set 2');
    
    elseif iSubPlot==3
        text(0.35,1.1,'Frequency set 3');
        
    elseif iSubPlot==4
        text(-0.35, 0.5,'Participant 2');   
    end
end
% now the desired labels have been applied

% Paste figures on the subplots
copyobj(allchild(get(fig1,'CurrentAxes')),h(1));
copyobj(allchild(get(fig2,'CurrentAxes')),h(2));
copyobj(allchild(get(fig3,'CurrentAxes')),h(3));
copyobj(allchild(get(fig4,'CurrentAxes')),h(4));
copyobj(allchild(get(fig5,'CurrentAxes')),h(5));
copyobj(allchild(get(fig6,'CurrentAxes')),h(6));
% now the subplots are pasted, the previous row and column labels are gone

As described in the code comments, the row and column lables disappear after I paste the figures into the subplot. Do you know how I can fix this? Thanks very much!

[Fangjun Jiang]

I ran it in R2015b and R2017b. The labels are kept. Unique to R2015a?

[Fangjun Jiang]

No problem in R2014b either. Could you double check?

[Hellen Jing Yuan]

Just checked again on R2015a and R2017a. Still no labels after executing the copyobj lines...

[Koundinya]

Tried this in R2015a and R2017a, the labels are intact. In your case ,maybe the labels are not visible because they are being obstructed by the figures ?

[Hellen Jing Yuan]

The figures fit within the space of each subplot, so it shouldn't obstruct the labels...

I suspect that this line

copyobj(allchild(get(fig1,'CurrentAxes')),h(1));

overrides the previous setting of the lables. But even when I do something like this

copyobj(allchild(get(fig1,'CurrentAxes')),h(1));
text(-0.35, 0.5,'Participant 1');
text(0.35,1.1,'Frequency set 1');
copyobj(allchild(get(fig2,'CurrentAxes')),h(2));
text(0.35,1.1,'Frequency set 2');

The labels are still missing.