How to plot (over one figure) one variable from each table located in 20 diffrent folders?

Question

Tomaszzz 2022-2-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1658430-how-to-plot-over-one-figure-one-variable-from-each-table-located-in-20-diffrent-folders

评论： Voss 2022-2-25

Hi all,

I have 20 folders. In each folder there is a table. Each table contains variable 'x'. I would like to plot variable x from all folders over one figure. Some of my dirty logic below:

Step 1: I can so far list all folders:

% List all folders
topLevelFolder = pwd;
files = dir(topLevelFolder);        % Get a list of folders in this folder.
dirFlags = [files.isdir];           
subFolders = files(dirFlags);       % Extract only those that are directories.
subFolders(1:2) = [];

Step 2: Next, I think I should list all tables from which variable x will be accessed

%%List all desired tables 
for k = 1:length(subFolders)
    all_tables = dir(fullfile(subFolders(1),'*_Cycles.mat')); % subfolder (1) beacuse the table I want to access in first on the list
end
Error using fullfile (line 67)
All inputs must be strings, character vectors, or cell arrays of character vectors.

Step 3: if step 2 works , I think I should load each table in a loop, load variable x, and plot in over one figure

%%Load each table, access variable x, and plot in over one figure
for k = 1:length(all_tables)    
    disp(all_tables(k).name)
    A  = fullfile(subFolders,all_tables(k).name);
    variable_X = load(A); 
end

Step 4: how to plot the x variable ?

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Answer 1

Voss 2022-2-25

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1658430-how-to-plot-over-one-figure-one-variable-from-each-table-located-in-20-diffrent-folders#answer_904550

在 MATLAB Online 中打开

% List all folders
topLevelFolder = pwd;
files = dir(topLevelFolder);        % Get a list of folders in this folder.
dirFlags = [files.isdir];
subFolders = files(dirFlags);       % Extract only those that are directories.
subFolders(1:2) = [];
% List all desired tables 
all_tables = cell(1,numel(subFolders));
for k = 1:numel(subFolders)
    temp = dir(fullfile(topLevelFolder,subFolders(k).name,'*_Cycles.mat'));
    if isempty(temp)
        continue
    end
    all_tables{k} = temp(1); % temp(1) beacuse the table I want to access in first on the list
end
% Load each table, access variable x, and plot in over one figure
figure();
for k = 1:numel(all_tables)
    if isempty(all_tables{k})
        continue
    end
    disp(all_tables{k}.name)
    A  = fullfile(topLevelFolder,subFolders(k).name,all_tables{k}.name);
    % loads all variables from mat-file A, and stores them in struct
    % variable_X:
    variable_X = load(A);
    % plots variable "X" (a field in the struct variable_X)
    plot(variable_X.X);
    hold on
end