how can I link subplots (for brush data)?

how can I link subplots (for brush data)?

this is my code :

colors = {'r', 'g', 'b', 'c', 'm', 'y', 'k',  [0, 0.5, 0.5], [0.5, 0.5, 0], [0, 0.5, 0], [0.5, 0, 0],[0, 0, 0.5], [0.5, 0.5, 0.5],[0.3010 0.7450 0.9330],[0.4660 0.6740 0.1880],[0.4940 0.1840 0.5560],[0.9290 0.6940 0.1250],[0.8500 0.3250 0.0980],[0.6350, 0.0780, 0.1840],[0 0.4470 0.7410]	};

            [filename,pathname] = uigetfile('*.csv', 'Select CSV files', 'MultiSelect', 'on');

            if isnumeric(filename) % user clicked Cancel
                return
            end

            s=size(filename,2);
            

    
            for i=1:s

            o= readtable(fullfile(pathname,filename{i}));

            cData1=table2array(o(:,1));
            cData2=table2array(o(:,2));
           
            fig = figure();
            subplot(3,1,1)
            p1=plot( cData1,cData2,...
                        'Color', colors{mod(i, numel(colors)) + 1});
           
            

              hold('on')
            end


            for i=1:s

            o= readtable(fullfile(pathname,filename{i}));

            cData1=table2array(o(:,1));
            cData3=table2array(o(:,3));
            subplot(3,1,2)
            p2=plot( cData1,cData3,...
                        'Color', colors{mod(i, numel(colors)) + 1});

               % grid(app.UIAxes2_2,'on')
              hold('on')
            end



   %%%%%%%%%%%%%%%%%%%%%%%% 
               


            for i=1:s

            o= readtable(fullfile(pathname,filename{i}));

            cData1=table2array(o(:,1));
            cData4=table2array(o(:,4));
             subplot(3,1,3)
            p3=plot( cData1,cData4,...
                        'Color', colors{mod(i, numel(colors)) + 1});

               % grid(app.UIAxes2,'on')
              hold('on')
            end
            


 
 
    b=brush(fig);
 b.ActionPostCallback = {@onBrushAction,p1,p2,p3};

    % callback function
    function onBrushAction(~, eventdata,p1,p2,p3)

        set(p1, 'BrushData', eventdata.Axes.Children.BrushData)
        set(p2, 'BrushData', eventdata.Axes.Children.BrushData)
        set(p3, 'BrushData', eventdata.Axes.Children.BrushData)

        
     
    end

[Mathieu NOE]

here's a demo how to link x axis

% Linking the x-axes of subplots in MATLAB can be very useful when you want to synchronize 
% the zooming and panning across multiple plots. 

% Create some sample data
x = linspace(0, 10, 100);
y1 = sin(x);
y2 = cos(x);

% Create the first subplot
subplot(2, 1, 1);
plot(x, y1);
title('Sine Wave');

% Create the second subplot
subplot(2, 1, 2);
plot(x, y2);
title('Cosine Wave');

% Link the x-axes of both subplots
linkaxes(findall(gcf, 'Type', 'axes'), 'x');

[Fateme]

Thank you Mathieu

it's very intresting.

but I want link the brush in plots (it work for one file in subplots but I want it for multi files).

this picture show that i want for one file .(but I want it for multi files)

[Mathieu NOE]

ok I have to try with your code but can you share some csv files ?

[Fateme]

thank you ,yes sure

Answer 1

[NVSL]

Hey @Fateme,

I have gone through your code and executed it using the CSV files you provided in response to Mathieu's comment. Assuming you want a 3x1 subplot where each plot is a line graph of each file’s 1st column with 2nd, 3rdand 4th columns respectively.

In the initial loop, you have “fig = figure()” executing for each file. This prevents first subplot from displaying super imposed line plots despite using “hold(on)” as “figure()” creates a new figure each time it’s called. To fix this issue I suggest moving the line “fig = figure()” above the 1st for loop. The below code snippet demonstrates the required modification.

s=size(filename,2);

%Create a single figure
fig = figure();

%.....
for i=1:s
    o= readtable(fullfile(pathname,filename{i}));
    cData1=table2array(o(:,1));
    cData2=table2array(o(:,2));
   
    %fig = figure(); 

For more details please refer to the following MathWorks documentation:

https://www.mathworks.com/help/matlab/ref/figure.html

Hope this helps!

[Fateme]

thank you :)

Answer 2

[Mathieu NOE]

tx to @NVSL for his contribution

I can add these little upgrades to your code , like having only one call to readtable at each loop iteration and other minor stuff, so at the end it's more compact, readable and better looking

here the x axes linking seems to work along the brush without conflict

colors = {'r', 'g', 'b', 'c', 'm', 'y', 'k',  [0, 0.5, 0.5], [0.5, 0.5, 0], [0, 0.5, 0], [0.5, 0, 0],[0, 0, 0.5], [0.5, 0.5, 0.5],[0.3010 0.7450 0.9330],[0.4660 0.6740 0.1880],[0.4940 0.1840 0.5560],[0.9290 0.6940 0.1250],[0.8500 0.3250 0.0980],[0.6350, 0.0780, 0.1840],[0 0.4470 0.7410]	};
[filename,pathname] = uigetfile('*.csv', 'Select CSV files', 'MultiSelect', 'on');

if isnumeric(filename) % user clicked Cancel
    return
end

s=size(filename,2);

fig = figure();
hold('on')
 
for i=1:s
    o= readtable(fullfile(pathname,filename{i}));
    
    subplot(3,1,1)
    cData1=table2array(o(:,1));
    cData2=table2array(o(:,2));
    p1=plot( cData1,cData2,'Color', colors{mod(i, numel(colors)) + 1});
    
    subplot(3,1,2)
    cData3=table2array(o(:,3));
    p2=plot( cData1,cData3,'Color', colors{mod(i, numel(colors)) + 1});
    
    subplot(3,1,3)
    cData4=table2array(o(:,4));
    p3=plot( cData1,cData4,'Color', colors{mod(i, numel(colors)) + 1});

end
            
% Link the x-axes of all subplots
linkaxes(findall(gcf, 'Type', 'axes'), 'x');            

% brush
b=brush(fig);
b.ActionPostCallback = {@onBrushAction,p1,p2,p3};

% callback function
function onBrushAction(~, eventdata,p1,p2,p3)
    set(p1, 'BrushData', eventdata.Axes.Children.BrushData)
    set(p2, 'BrushData', eventdata.Axes.Children.BrushData)
    set(p3, 'BrushData', eventdata.Axes.Children.BrushData)
end