Devide cell array into unequal length cells based on file name

Question

Tessa Kol 2020-9-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596446-devide-cell-array-into-unequal-length-cells-based-on-file-name

编辑： Ameer Hamza 2020-9-20

With the following code I imported all of the .data files. All .data files of simulation 1 are located in folder 1 and all .data files of simulation 2 are located in folder 2.

%% Loading the data
rhoPart = 2540;
files = dir(fullfile(uigetdir,'\**\*.data*'));
[~,Index] = natsort({files.name});
files = files(Index);
expData = cell(length(files),1);
k = 1;
for i = 1:length(files)
    fid = fopen(fullfile(files(i).folder,files(i).name),'r');
    %% Reading the data
    % Read all the data from the file
    dataRead = textscan(fid,'%f %f %f %f %f %f %f %f %f %f %f %f %f %f','HeaderLines',1);
    frewind(fid);
    % Write headerline N, time, xmin, ymin, zmin, xmax, ymax, zmax
    runData{k} = strsplit(fgetl(fid), ' ');
    % Write only the x, y, and z components of the particles, particle radius,
    % z component+ particle radius and volume of the particle
    expData{k} = [dataRead{1}(:,1) dataRead{2}(:,1) dataRead{3}(:,1) dataRead{7}(:,1) dataRead{3}(:,1)+dataRead{7}(:,1) rhoPart*(4/3)*pi*(dataRead{7}(:,1).^3)];
    % Write only the vx,vy,vz of the particles and magnitude
    velData{k} = [dataRead{4}(:,1) dataRead{5}(:,1) dataRead{6}(:,1) sqrt(dataRead{4}(:,1).^2 + dataRead{5}(:,1).^2 + dataRead{6}(:,1).^2)];
    fclose(fid);
    k = k + 1;
end

This is the resulting workspace:

Simulation 1 (thus folder 1) contains 2745 .data files and simulation 2 (thus folder 2) contains 2741 files.

Is there a way to organize expData into a 2745x1 cell and 2741x1 cell without having to look up manually how many files each folder contains?

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Answer 1

Ameer Hamza 2020-9-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596446-devide-cell-array-into-unequal-length-cells-based-on-file-name#answer_497254

在 MATLAB Online 中打开

Divide the data based on folder names. Something like this

%% Loading the data
rhoPart = 2540;
files = dir(fullfile(uigetdir,'\**\*.data*'));
[~,Index] = natsort({files.name});
files = files(Index);
folders = {files.folder};
folder_groups = findgroups(folders);
expData = cell(length(files),1);
k = 1;
for i = 1:length(files)
    fid = fopen(fullfile(files(i).folder,files(i).name),'r');
    %% Reading the data
    % Read all the data from the file
    dataRead = textscan(fid,'%f %f %f %f %f %f %f %f %f %f %f %f %f %f','HeaderLines',1);
    frewind(fid);
    % Write headerline N, time, xmin, ymin, zmin, xmax, ymax, zmax
    runData{k} = strsplit(fgetl(fid), ' ');
    % Write only the x, y, and z components of the particles, particle radius,
    % z component+ particle radius and volume of the particle
    expData{k} = [dataRead{1}(:,1) dataRead{2}(:,1) dataRead{3}(:,1) dataRead{7}(:,1) dataRead{3}(:,1)+dataRead{7}(:,1) rhoPart*(4/3)*pi*(dataRead{7}(:,1).^3)];
    % Write only the vx,vy,vz of the particles and magnitude
    velData{k} = [dataRead{4}(:,1) dataRead{5}(:,1) dataRead{6}(:,1) sqrt(dataRead{4}(:,1).^2 + dataRead{5}(:,1).^2 + dataRead{6}(:,1).^2)];
    fclose(fid);
    k = k + 1;
end
expData_partition = splitapply(@(x) x, expData, folder_groups);