Create a loop that add data from different datasets into a plot

Hello,

I am trying to create a specific a loop that would allow me to add new data in a plot.

Let me explain, I have several datasets (12) with 3 ≠ sheets everytime from which I am calculating mean between rows, diff between rows and mean of differences.

I'd like to do that for all my data sets and then plot all the mean and diff on the same plot, without having to create a new dataset and save means and diffs independantly.

My aim is to create a bland-altman plot of every datasets based on Pre, BH and Post using different symbols between trials and colors between Pre,BH and Post.

Here is the row code doing so for one dataset:

for n=4 %first data set
    file=[datapath,d(n).name]; 
    Pre = readtable(file,'Sheet',"Pre"); %sheet 1 of dataset1
    Pre=table2array(Pre(:,["Var3","Var8"]));
    BH = readtable(file,'Sheet',"BH"); %sheet 2 of dataset1
    BH=table2array(BH(:,["Var3","Var8"]));
    Post = readtable(file,'Sheet',"Post"); %sheet 3 of dataset1
    Post=table2array(Post(:,["Var3","Var8"]));

    meanPre=mean(Pre,2);
    meanBH=mean(BH,2);
    meanPost=mean(Post,2);
    
    diffPre=diff(Pre,1,2);
    diffBH=diff(BH,1,2);
    diffPost=diff(Post,1,2);
    
    meandiffPre=mean(diffPre);
    meandiffBH=mean(diffBH);
    meandiffPost=mean(diffPost);

scatter(meanPre,diffPre,'Marker','x','MarkerEdgeColor','r')
hold on
scatter(meanBH,diffBH,'Marker','x','MarkerEdgeColor','b')
scatter(meanPost,diffPost,'Marker','x','MarkerEdgeColor','m')
hold off
end

Thanks,

Marine

[Image Analyst]

It would be easier if you'd attach at least two files. Make it easy for us to help you, not hard.

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

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[Marpe]

My bad, I just added the data

Answer 1

[Voss]

Maybe something along these lines will get you started:

datapath = '.';

files = dir(fullfile(datapath,'*.xlsx'));

figure();
hold on
markers = 'xo';
colors = 'rbm';

n_files = numel(files);
h = zeros(3,n_files);

for ii = 1:n_files
    
    file = fullfile(datapath,files(ii).name);
    
    Pre = readtable(file,'Sheet',"Pre"); %sheet 1 of dataset1
    Pre=table2array(Pre(:,["Var3","Var8"]));
    BH = readtable(file,'Sheet',"BH"); %sheet 2 of dataset1
    BH=table2array(BH(:,["Var3","Var8"]));
    Post = readtable(file,'Sheet',"Post"); %sheet 3 of dataset1
    Post=table2array(Post(:,["Var3","Var8"]));
    meanPre=mean(Pre,2);
    meanBH=mean(BH,2);
    meanPost=mean(Post,2);
    
    diffPre=diff(Pre,1,2);
    diffBH=diff(BH,1,2);
    diffPost=diff(Post,1,2);
    
    meandiffPre=mean(diffPre);
    meandiffBH=mean(diffBH);
    meandiffPost=mean(diffPost);
    
    h(:,ii) = [ ...
        scatter(meanPre,diffPre,'Marker',markers(ii),'MarkerEdgeColor',colors(1)) ...
        scatter(meanBH,diffBH,'Marker',markers(ii),'MarkerEdgeColor',colors(2)) ...
        scatter(meanPost,diffPost,'Marker',markers(ii),'MarkerEdgeColor',colors(3)) ...
        ];
    
end

legend_str = string({files.name}) + " " + ["Pre"; "BH"; "Post"];

% % in older versions of MATLAB, do this instead:
% legend_str = strcat(repmat({files.name},3,1),{' '},repmat({'Pre';'BH';'Post'},1,n_files))

legend(h(:),legend_str, ...
    'Interpreter','none', ...
    'NumColumns',n_files)

[Marpe]

That is exactly what I wanted thanks!

[Voss]

You're welcome!