How to update titles and text annotations of subplots located on the same uitab?

% TAB 1 
S.tabH(1) = uitab(S.histoTab, 'Title', 'Error X');

S.P1_histo{1} = subplot(2,2,[1 3], 'Parent', S.tabH(1));
s2.tab1sp1 = hggroup;

S.P1_histo{2} = subplot(2,2,[2 4], 'Parent', S.tabH(1));
s2.tab1sp2 = hggroup;

% TAB 2
S.tabH(2) = uitab(S.histoTab, 'Title', 'Error Y');

S.P2_histo{1} = subplot(2,2,[1 3], 'Parent', S.tabH(2));
title('On Fly'); 
s2.tab2sp1 = hggroup; 

S.P2_histo{2} = subplot(2,2,[2,4], 'Parent', S.tabH(2)); 
title('Static');
s2.tab2sp2 = hggroup;

 %%In the Callback Function

    handles = guidata(source);
    currentTab = find(source.SelectedTab == S.tabH);

    switch currentTab
        case 1

            if ~isempty(handles.R_Site_X_Static_NM_DRF)   
                histogram(handles.R_Site_X_Static_NM_DRF, 'parent',s2.tab1sp2);
                ThreeSig_X_S = 3 * std(handles.R_Site_X_Static_NM_DRF);
                stringH1 = strcat({'Static, '},{'3sig: '}, {num2str(ThreeSig_X_S)});
                title(S.P1_histo{1}, 'Static');
                text(S.P1_histo{1},0, 200, stringH1);

            end

            if ~isempty(handles.R_Site_X_OnFly_NM_DRF)
                histogram(handles.R_Site_X_OnFly_NM_DRF, 'parent', s2.tab1sp1);
                ThreeSig_X_OF = round(3 * std(handles.R_Site_X_OnFly_NM_DRF),3);
                stringH2 = strcat({'3sig: '}, {num2str(ThreeSig_X_OF)}); 
                title(S.P1_histo{2}, 'On Fly');
                text(S.P1_histo{2},0.2, 130, stringH2, 'FontWeight', 'Bold');
            end
         case 2 
        ...

I am getting the title and text annotation only for the second subplot of tab 1. When debugging the code line by line, I get the title and text for the first subplot too, but it later disappears.

Answer 1

[Naga]

The issue you're facing with the title and text annotations disappearing could be related to the use of hggroup as the parent for your histograms. When you update a plot with a new plot command (like histogram), it usually clears the axes unless you specify otherwise. Here are a few suggestions to fix this issue:

1. Before plotting the histogram, explicitly set the current axes using the axes() function to ensure that the plots and annotations are directed to the correct subplot.Directly call the histogram function to plot the data on the specified axes.
2. Use the title() and text() functions to add titles and annotations to the plots. Construct annotation strings using strcat() to include statistical information.
3. Ensure that the plots and annotations are not inadvertently cleared by setting the axes context appropriately.

This approach ensures that each subplot retains its title and annotations after plotting. Please find the updated code:

% TAB 1
S.tabH(1) = uitab(S.histoTab, 'Title', 'Error X');
S.P1_histo{1} = subplot(2,2,[1 3], 'Parent', S.tabH(1));
S.P1_histo{2} = subplot(2,2,[2 4], 'Parent', S.tabH(1));

% TAB 2
S.tabH(2) = uitab(S.histoTab, 'Title', 'Error Y');
S.P2_histo{1} = subplot(2,2,[1 3], 'Parent', S.tabH(2));
title(S.P2_histo{1}, 'On Fly');
S.P2_histo{2} = subplot(2,2,[2 4], 'Parent', S.tabH(2));
title(S.P2_histo{2}, 'Static');

% Callback Function
handles = guidata(source);
currentTab = find(source.SelectedTab == S.tabH);

switch currentTab
    case 1
        if ~isempty(handles.R_Site_X_Static_NM_DRF)
            axes(S.P1_histo{1});
            histogram(handles.R_Site_X_Static_NM_DRF);
            title('Static');
            text(0, 200, strcat('Static, 3sig: ', num2str(3 * std(handles.R_Site_X_Static_NM_DRF))));
        end
        if ~isempty(handles.R_Site_X_OnFly_NM_DRF)
            axes(S.P1_histo{2});
            histogram(handles.R_Site_X_OnFly_NM_DRF);
            title('On Fly');
            text(0.2, 130, strcat('3sig: ', num2str(round(3 * std(handles.R_Site_X_OnFly_NM_DRF), 3))), 'FontWeight', 'Bold');
        end
    case 2
        % Additional code for case 2
end