Open multiple files from the same folder with fopen and textscan

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Tessa Kol
Tessa Kol 2020-8-26
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.

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采纳的回答

Mohammad Sami
Mohammad Sami 2020-8-26
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{:});

更多回答（1 个）

Stephen23
Stephen23 2020-8-26
编辑：Stephen23 2020-8-26
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
https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

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