How to merge figures in one another?

I have two different figures : figure(1); and figure(2); I want these to be merged into a figure(3) to be shown together.

How to ?

notice: I do not want to use function hold for plots.

Answer 1

[LISSA DUVVU]

h1=openfig('figure1','reuse');

ax1=gca;

h2=openfig('figure2','reuse');

ax2=gca;

%%figure 3%%

s1=subplot(2,1,1)

s2=subplot(2,1,2)

fig1=get(ax1,'children');

fig2=get(ax2,'children');

copyobj(fig1,s1);

copyobj(fig2,s2);