Open multiple files from the same folder with fopen and textscan

Question

Tessa Kol 2020-8-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/584672-open-multiple-files-from-the-same-folder-with-fopen-and-textscan

编辑： Stephen23 2020-8-26

In matlab I wrote the following code:

fid = fopen('LedgeTest_muSP_0.20_muRP_0.20.data.852','r');
% 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);
expData = [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)];

Problem: How can I open en read multiple files from the same folder?

Problem example: All of the 5 .data files are located in the same folder together with the matlab code (see picture below)

In a for loop I want to extract the data from each .data file.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mohammad Sami 2020-8-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/584672-open-multiple-files-from-the-same-folder-with-fopen-and-textscan#answer_485132

在 MATLAB Online 中打开

You can use a for loop to iterate over the files;

files = dir(fullfile(pwd,'*.data*'));
data = cell(length(files),1);
for i = 1:length(files)
    fid = fopen(fullfile(files(i).folder,files(i).name),'r');
% 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);
    data{i} = [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)];
end
alldata = vertcat(data{:});

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Stephen23 2020-8-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/584672-open-multiple-files-from-the-same-folder-with-fopen-and-textscan#answer_485129

编辑：Stephen23 2020-8-26

在 MATLAB Online 中打开

Following the examples in the documentation:

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

D = 'absolute or relative path to the folder where the files are saved';
S = dir(fullfile(D,'Ledge*.data.*'));
fmt = repmat('%f',1,14);
opt = {'HeaderLines',1, 'CollectOutput',true};
for k = 1:numel(S)
    fnm = fullfile(D,S(k).name);
    [fid,msg] = fopen(fnm,'rt');
    assert(fid>=3,msg)
    tmp = textscan(fid,fmt,opt{:});
    fclose(fid);
    mat = tmp{1};
    ... process mat data
    S(k).data = mat;
end