Subplot on a saved figure only working for one subplot

I have a figure with three subplots (1 column, 3 rows) that has been pre-allocated with all the formatting and saved.

    % allocate figures for saving joint angles per subject
    pre_ang_fig = figure();
    pre_ax1 = subplot(3,1,1);
    ylabel('Ankle angle (\circ)')
    set(gca,'TickDir','out')
    title('Pre Angles')
    pre_ax2 = subplot(3,1,2);
    ylabel('Knee angle (\circ)')
    set(gca,'TickDir','out')
    pre_ax3 = subplot(3,1,3);
    xlabel('Gait cycle %')
    ylabel('Hip angle (\circ)')
    set(gca,'TickDir','out')
    saveas(pre_ang_fig,[sub_ext '_' trans_typ '_pre_joint_angles.fig'])

In a loop,I then want to load that figure, and plot some additional data on each subplot, maintaining axis formatting and keeping all data present.

My current code (see below), loads the figure fine and plots perfectly on the third subplot but the first two are remade every time. I have tried using axes instead of subplot but I end up with the exact same result.

 pre_ang_fig = openfig([sub_ext '_' trans_typ '_pre_joint_angles.fig']); %load figure
                
                if all_cycles(ii,4) == 1 % if right leg plot right leg data in red
                    figure(pre_ang_fig)
                    hold all                    
                    subplot(3,1,1)
                    plot(cycle_norm(:,13),'r') %ankle
                    subplot(3,1,2)
                    plot(cycle_norm(:,9),'r') %knee
                    subplot(3,1,3)
                    plot(cycle_norm(:,5),'r') %hip
                elseif all_cycles(ii,4) == 2 % if left leg, plot left leg data in green
                    figure(pre_ang_fig)
                    hold all
                    subplot(3,1,1)
                    plot(cycle_norm(:,15),'g') %ankle
                    subplot(3,1,2)
                    plot(cycle_norm(:,11),'g') %knee
                    subplot(3,1,3)
                    plot(cycle_norm(:,7),'g') %hip
                end
                
                saveas(pre_ang_fig, [sub_ext '_' trans_typ '_pre_joint_angles.fig'])

I would like all subplots to look like the bottom subplot here, but instead the first two get overwritten each time and so this is the resulting figure I end up with.

Any help is really appreciated!

Answer 1

[Sulaymon Eshkabilov]

I presume that you have a loop before "if... end" operations, correct?

You should put "hold all" command after your "plot()" command not after "figure" command.