Land data from multiple subfolders into structure
显示 更早的评论
I'm trying to create a structure from multiple data files for multiple participants. When I run the following code, an empty structure is created. None of the data files loads. I'm not getting any errors. Screenshot of the files in the path is below.
I am a relatively new user, so it may be something simple.
% Create a Directory
Fold = dir('path');
SubFolds = Fold([Fold.isdir]); % keep only the directories
% Loop each folder
% For loop: Read each signal file into a data structure, then save incase we want it later
for i = 1:length(SubFolds)
data.EDA = readtable(join([Fold,'/',SubFolds(i),'/EDA.csv'],''));
data.ECG = readtable(join([Fold,'/',SubFolds(i),'/ECG.csv'],''));
data.EEG = readtable(join([Fold,'/',SubFolds(i),'/EEG.csv'],''));
data.PPG = readtable(join([Fold,'/',SubFolds(i),'/PPG.csv'],''));
data.ACC = readtable(join([Fold,'/',SubFolds(i),'/ACC.csv'],''));
disp('Participant Sructure.');
name = ['SubFolds',num2str(i)];
save(fullfile(join([Fold,'/',SubFolds(i)],''),name),'data')
end
% Lists with all of the subject Numbers and File names
parts = ["P01","P02","P03","P04","P05","P06","P07","P08","P09","P10","P11","P12","P13","P14","P15","P16","P17"];
signals = ["EDA.csv",'PPG1.csv','PPG2.csv','ECG.csv','EEG.csv'];
2 个评论
"When I run the following code, an empty structure is created"
Which structure? Do you mean that SUBFOLDS is empty? That would occur if no folders were found by DIR on the specified path. Which makes sense, because there are no folders in your screenshot named "path".
Instead of using "path", you need to use the an absolute/relative path to the main folder.
Susan
2023-11-2
采纳的回答
Taylor
2023-11-2
1 个投票
You are not calling dir properly. The string input to dir should be an absolute or relative path name. Try changing the string to 'Import_Data'.
https://www.mathworks.com/help/matlab/ref/dir.html
4 个评论
folder = 'my_path';
parts = "P01";
i = 1;
@Susan Tilbury: You can use fullfile to construct your file names, which allows you to avoid having to type the directory separator character (in this case '/') that you had to have when using join:
join([folder,'/',parts(i),'/EDA.csv'],'')
fullfile(folder,parts(i),'EDA.csv') % the same, but clearer
Also, you can simplify this part and avoid having to type all that:
parts = ["P01","P02","P03","P04","P05","P06","P07","P08","P09","P10","P11","P12","P13","P14","P15","P16","P17"]
parts = compose("P%02d",1:17) % the same, but easier
Susan
2023-11-2
Voss
2023-11-2
You're welcome!
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Search Path 的更多信息
Translated by 
