How can I solve this problem "Invalid or deleted object." Is hold 'on' missing somewhere?

Hello everyone,

I really hope someone can help me. I tried to figure out what this Error "Invalid or deleted object." causes but I can't find the solution. Any advice is really much appreciated. I uploaded a Matlab file for better testing purposes.

My goal is basically to plot three graphs on one axis but why is the plot handle deleted? Even if every "hold on" in the code is active the error still exists...

Full Error: Invalid or deleted object. Error in Forum (line 214): handle_figure1_plt_legend(intCounter).Color = handle_figure1_plots(intCounter).Color;

Thank you very much,

Jonathan

%% Settings for six small diagrams
data.strSmallPlotTitles     = {'1', ...
                               '2', ...
                               '3', ...
                               '4', ...
                               '5', ...
                               '6'};

data.strYLabel              = {'Concentration [g/L]'};

% - Font style
data.strFontTitle           = 'Times New Roman';
data.intFontsizeTitle       = 13;
data.strFontLabel           = 'Times New Roman';
data.intFontsizeLabel       = 12;

data.intCultivationFinishedAfter = 24;

blnPlotSmallDiagrams = true;
intNumberOfFigure = [3 4];

%% Fake data
time = (0:0.1:data.intCultivationFinishedAfter-0.1);

% Create YOUT
dX_ae_dt = rand(length(time),1)*15;
dX_yt_dt = rand(length(time),1)*4;
dGlc_dt = rand(length(time),1)*0.5;
dO2_dt = rand(length(time),1)*10;
dCO2_dt = rand(length(time),1)*5;
dEtOH_dt = rand(length(time),1)*4;

YOUT = [dX_ae_dt ...
       dX_yt_dt ...
       dGlc_dt ...
       dO2_dt ...
       dCO2_dt ...
       dEtOH_dt ...
       ];

%% Color matrix for the different diagrams
matColorTemplate = ['#3C8F44'   % 1
                    '#C99D44'   % 2
                    '#C94A2A'   % 3
                    '#4CB1DB'   % 4
                    '#6F878F'   % 5
                    '#1B56D6'   % 6
                    ];
                
% Marker
ax6_inv_marker = '*';
ax3_inv_marker = 'd';
ax4_inv_marker = 's';
ax5_inv_marker = 'p';

ax_inv_marker = [ax6_inv_marker
                 ax3_inv_marker
                 ax4_inv_marker
                 ax5_inv_marker];
             
matMarker = ['*'
             'd'
             's'
             'p'
             'x'
             '+'
             ];

%% Six small diagrams in one big figure

if data.blnPlotSmallDiagrams == true

    matFigureExists = findobj('type','figure','name','Six individual diagrams');
    
%     % Does a figure already exists?
%     if isempty(matFigureExists) == true
%         % Initialize figure handle
%         h_figure1 = figure(intNumberOfFigure(2));
% 
%         % Half or full display size
%         if data.blnPlotBigDiagram == true
%             h_figure1.Position = [Pix_SS(3)/2, 50, Pix_SS(3)/2, 950]; % left bottom width high
%         else
%             h_figure1.Position = [1, 50, Pix_SS(3), 950]; % left bottom width high
%         end
%         
%         % Figure settings
%         h_figure1.Color = [1,1,1];                      % Background color
%         h_figure1.Units = 'normalized';
%         h_figure1.Name  = 'Six individual diagrams';    % Name of the figure
%     end

    % Allow multiple diagrams in one figure
    tiledlayout(2,3)    % Requires R2019b or later

    % Initialize axes handles
    h_f1_ax1 = nexttile;    % Position: Row=1, Column=1
    h_f1_ax2 = nexttile;    % Position: Row=2, Column=1
    h_f1_ax3 = nexttile;    % Position: Row=1, Column=3
    h_f1_ax4 = nexttile;    % Position: Row=1, Column=2
    h_f1_ax5 = nexttile;    % Position: Row=2, Column=2
    h_f1_ax6 = nexttile;    % Position: Row=2, Column=3


    handle_figure1_axes = [h_f1_ax1 % 1
                           h_f1_ax4 % 2                      
                           h_f1_ax3 % 3
                           h_f1_ax2 % 4
                           h_f1_ax5 % 5
                           h_f1_ax6 % 6
                           ];
    
    % Initialize plot handles (Visual)
    h_f1_plot1 = plot(1,1);
    h_f1_plot2 = plot(1,1);
    h_f1_plot3 = plot(1,1);
    h_f1_plot4 = plot(1,1);
    h_f1_plot5 = plot(1,1);
    h_f1_plot6 = plot(1,1);
    
    handle_figure1_plots = [h_f1_plot1
                            h_f1_plot4
                            h_f1_plot3
                            h_f1_plot2
                            h_f1_plot5
                            h_f1_plot6
                            ];
    
    % Initialize plot handles (Marker)
    h_f1_plt_marker1 = plot(NaN,NaN);
    h_f1_plt_marker2 = plot(NaN,NaN);
    h_f1_plt_marker3 = plot(NaN,NaN);
    h_f1_plt_marker4 = plot(NaN,NaN);
    h_f1_plt_marker5 = plot(NaN,NaN);
    h_f1_plt_marker6 = plot(NaN,NaN);

    handle_figure1_plt_marker = [h_f1_plt_marker1
                                 h_f1_plt_marker2
                                 h_f1_plt_marker3
                                 h_f1_plt_marker4
                                 h_f1_plt_marker5
                                 h_f1_plt_marker6
                                 ];
    
   % Initialize plot handles (Legend)
	h_f1_plt_legend1 = plot(NaN,NaN);
	h_f1_plt_legend2 = plot(NaN,NaN);
	h_f1_plt_legend3 = plot(NaN,NaN);
	h_f1_plt_legend4 = plot(NaN,NaN);
	h_f1_plt_legend5 = plot(NaN,NaN);
	h_f1_plt_legend6 = plot(NaN,NaN);                         
                             
    handle_figure1_plt_legend = [h_f1_plt_legend1
                                 h_f1_plt_legend2
                                 h_f1_plt_legend3
                                 h_f1_plt_legend4
                                 h_f1_plt_legend5
                                 h_f1_plt_legend6
                                 ];
                             
    % Settings for the six small diagrams in a loop
    for intCounter = 1:size(YOUT,2)     % Entries of columns
        
        
        hold (handle_figure1_axes(intCounter),'on');
        handle_figure1_plots(intCounter)                    = plot(handle_figure1_axes(intCounter), ...
                                                                   time, ...
                                                                   YOUT(:,intCounter));
        
        handle_figure1_axes(intCounter).XLim                = [0 data.intCultivationFinishedAfter];
        handle_figure1_axes(intCounter).XLabel.String       = data.strXLabel{1};
        handle_figure1_axes(intCounter).XLabel.FontSize     = data.intFontsizeLabel;
        handle_figure1_axes(intCounter).XLabel.FontName     = data.strFontLabel;

        handle_figure1_axes(intCounter).XTick               = 0:3:data.intCultivationFinishedAfter;
        handle_figure1_axes(intCounter).XGrid               = 'on';
        
        %handle_figure1_axes(intCounter).YLim                = [0 YLim_calculated(intCounter)];  % Alternativ: auto
        handle_figure1_axes(intCounter).YLabel.String       = data.strYLabel{1};
        handle_figure1_axes(intCounter).YLabel.FontSize     = data.intFontsizeLabel;
        handle_figure1_axes(intCounter).YLabel.FontName     = data.strFontLabel;
        %handle_figure1_axes(intCounter).YTick               = 0:YLim_calculated(intCounter)/10:YLim_calculated(intCounter);
        handle_figure1_axes(intCounter).YGrid               = 'on';   
        
        handle_figure1_plots(intCounter).Color              = matColorTemplate(intCounter,:);
        handle_figure1_plots(intCounter).LineWidth          = 1.1;
    
        % Position handling of the XLabel and YLabel
        handle_figure1_axes(intCounter).XLabel.Position(2)  = handle_figure1_axes(intCounter).XLabel.Position(2) - abs(handle_figure1_axes(intCounter).XLabel.Position(2)*0.1);
        handle_figure1_axes(intCounter).YLabel.Position(1)  = handle_figure1_axes(intCounter).YLabel.Position(1) - abs(handle_figure1_axes(intCounter).YLabel.Position(1)*0.1);
        
        % Titles settings
        title(handle_figure1_axes(intCounter),data.strSmallPlotTitles{intCounter});
        handle_figure1_axes(intCounter).Title.FontName      = data.strFontTitle;
        handle_figure1_axes(intCounter).Title.FontSize      = data.intFontsizeTitle;
        handle_figure1_axes(intCounter).Title.FontWeight    = 'bold';
        handle_figure1_axes(intCounter).Title.Position(2)   = handle_figure1_axes(intCounter).Title.Position(2) + abs(handle_figure1_axes(intCounter).Title.Position(2)*0.01);     % left bottom width high
    
        % Plot Marker on current axis
        if intCounter < 6
            %hold (handle_figure1_axes(intCounter),'on')
            handle_figure1_plt_marker(intCounter)           = plot(handle_figure1_axes(intCounter),time(5:20:end),YOUT(5:20:end,intCounter));
            handle_figure1_plt_marker(intCounter).Color     = handle_figure1_plots(intCounter).Color;
            handle_figure1_plt_marker(intCounter).Marker    = matMarker(intCounter);
            handle_figure1_plt_marker(intCounter).LineStyle = 'none';           
            %hold(handle_figure1_axes(intCounter),'off')
        else
            handle_figure1_plots(intCounter).LineStyle          = '--';
            %hold(handle_figure1_axes(intCounter),'off')
        end
    
        % Plot Legend on current axis
        if intCounter < 6
            %hold(handle_figure1_axes(intCounter),'on')
            handle_figure1_plt_legend(intCounter).Color     = handle_figure1_plots(intCounter).Color;
            handle_figure1_plt_legend(intCounter).Marker    = handle_figure1_plt_marker(intCounter).Marker;
            %hold(handle_figure1_axes(intCounter),'off')
        end       
        %hold (handle_figure1_axes(intCounter),'off')     
    end
end

Answer 1

[Walter Roberson]

    h_f1_plot1 = plot(1,1);
    h_f1_plot2 = plot(1,1);

Those are on the same axes, the one you activated with

   h_f1_ax6 = nexttile;    % Position: Row=2, Column=3

You have no "hold on" after the first plot() call, so the second one will remove the first one.

As you are taking the time to record the axes handles, I recommend that you always use the axes handle in the plot call, and remember to hold on:

   h_f1_plot1 = plot(h_f1_ax1, 1, 1);
   hold(h_f1_ax1, 'on')
   h_f1_plt_marker1 = plot(h_f1_ax1, NaN, NaN);

or as appropriate.

[Jonathan P]

Thank you very much for the fast support! That fixed it!

Thank you for sharing your knowledge. :)