Refresh data in plot

I ty to refresh my mean in my plot, depending on my legends visibility but it doesn't works.

My ligne of code :

Data_Traitee = Choix_ContractionsEXCCON(Data_Traitee);

My functions :

function Data_Traitee = Choix_ContractionsEXCCON(Data_Traitee)

global visibilite mean_plot ContractionsExt 

for j = 1: length(Data_Traitee)
    fig = figure('units','normalized','outerposition',[0 0 1 1 ]);
%..............a part of my code
    plot(Angles(:,i), ContractionsExt(:,i),'Color', color(i),'DisplayName', LegendStrings(i),'LineWidth',2);
    
    userData.PlotData = struct('Angles', Angles, 'ContractionsExt', ContractionsExt, 'LegendStrings', LegendStrings);
    userData.SelectionFinie = false; % definie le bouton selection fini faux pour que quand on clique dessus il soit vrai et que ça passe à l'action suivante uniquement à ce moment là 
    set(fig, 'UserData', userData);
    
    mean_plot = mean(ContractionsExt,2);
    plot(Angles,mean_plot,'k','LineStyle','--','LineWidth',1.8); % ajout de la moyenne 
    
    %........................a part of my code 
    l.ItemHitFcn = @(src, event) hitcallback_ex1(src, event, fig); % callback de la legende si on clique dessus la contraction n'est plus ploté
    
    %.......................a part of my code
    Data_Traitee(j).ContractionsExt_Interp_Select(sum((Data_Traitee(j).ContractionsExt_Interp_Select==0),2)>0,:) = [];
    
    clearvars l LegendStrings ContractionsExt Angles 
    
    % Vérifier si le bouton "Sélection finie" a été sélectionné :
    if userData.SelectionFinie
        % Le bouton a été sélectionné, passez à l'itération suivante
    else
        % Le bouton n'a pas été sélectionné, ignorez cette itération
        continue;
    end
    
    % Réinitialiser la propriété "SelectionFinie" pour la prochaine itération
    setappdata(fig, 'SelectionFinie', false);
    clearvars userData
end
end


function hitcallback_ex1(src, evnt, fig)

    global mean_plot ContractionsExt 
    figUserData = get(fig, 'UserData');

    % Récupérer les poignées des lignes tracées
    hLines = findobj(gca, 'Type', 'line');

    if strcmp(evnt.Peer.Visible, 'on')
        evnt.Peer.Visible = 'off';
    else
        evnt.Peer.Visible = 'on';
    end

    % Enregistrer l'état de visibilité des contractions dans UserData
    contractionVisibility = containers.Map('KeyType', 'char', 'ValueType', 'logical');
    for i = 1:numel(hLines)
        lineDisplayName = hLines(i).DisplayName;
        contractionVisibility(lineDisplayName) = strcmp(hLines(i).Visible, 'on');
    end

    % Mettre à jour la moyenne en fonction de la visibilité
    visibleContractions = [contractionVisibility.values{:}];
    mean_plot = mean(ContractionsExt(:, visibleContractions), 2);

    % Trouver le handle de la ligne moyenne
    hMeanLine = findobj(gca, 'DisplayName', 'Moyenne'); 

    % Mettre à jour la ligne moyenne
    set(hMeanLine, 'YData', mean_plot);

    figUserData.ContractionVisibility = contractionVisibility;
    set(fig, 'UserData', figUserData)

end

My code is with many funtions maybe it's the problem ? I think my problem is in the end of my function hitcallback_ex1. Can somebody help ?

Answer 1

[prabhat kumar sharma]

Hello Pi_etudiant,

It seems you're attempting to refresh the mean plot line in your chart whenever you change the visibility of specific lines (which symbolize contractions) by interacting with the legend entries. I've identified a couple of potential concerns within your hitcallback_ex1 function that might be contributing to the difficulties you're facing.

1. Utilization of Global Variables: The practice of employing global variables, including mean_plot and ContractionsExt, might yield unpredictable results, particularly when they are altered across various sections of your code. A more reliable approach would involve passing these variables as parameters to your functions or incorporating them into UserData or appdata.
2. Construction of the Visibility Array: You're trying to generate a logical array to represent the visible contractions with the expression visibleContractions = [contractionVisibility.values{:}];. However, it's possible that the array isn't being formed as you expect. Verify that the map's keys in contractionVisibility correspond precisely with the DisplayName of each line.
3. Refreshing the Mean Line: Be cautious to select the appropriate plot handle when you're refreshing the mean line, and confirm that you're modifying the intended line.

Here is the revised version of the code , I belive it should resolve your issue.

function hitcallback_ex1(src, evnt, fig)
    figUserData = get(fig, 'UserData');
    ContractionsExt = figUserData.PlotData.ContractionsExt;  % Get ContractionsExt from UserData
    Angles = figUserData.PlotData.Angles;  % Get Angles from UserData

    % Toggle the visibility of the selected line
    if strcmp(evnt.Peer.Visible, 'on')
        evnt.Peer.Visible = 'off';
    else
        evnt.Peer.Visible = 'on';
    end

    % Get all line handles and their corresponding display names
    hLines = findobj(gca, 'Type', 'line');
    lineDisplayNames = {hLines.DisplayName};

    % Determine which lines are visible
    visibleLines = strcmp({hLines.Visible}, 'on');

    % Calculate the mean for visible contractions
    visibleContractions = ContractionsExt(:, visibleLines);
    mean_plot = mean(visibleContractions, 2, 'omitnan');

    % Find the handle of the mean plot line
    hMeanLine = findobj(gca, 'Type', 'line', 'DisplayName', 'Moyenne');

    % Update the mean plot line
    if ~isempty(hMeanLine)
        set(hMeanLine, 'YData', mean_plot);
    else
        % If the mean line does not exist, create it
        hold on;
        plot(Angles, mean_plot, 'k', 'LineStyle', '--', 'LineWidth', 1.8, 'DisplayName', 'Moyenne');
        hold off;
    end

    % Update the UserData with the new mean plot
    figUserData.mean_plot = mean_plot;
    set(fig, 'UserData', figUserData);
end

I hope it helps!