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Read multiple txt files and save them according to their name

조회 수: 1 (최근 30일)
Mathew Smith
Mathew Smith 2023년 8월 30일
편집: Mathieu NOE 2023년 8월 31일
Hello,
I would like to read multiple text files with names like A16.txt, B64.txt and save them like matrices in Matlab. Each of the files look like this below:
Time [s] Deformation Probe (X) [mm] Deformation Probe (Y) [mm] Deformation Probe (Z) [mm] Deformation Probe (Total) [mm]
1 1. -2.05900494e-002 9.53490478e-002 -5.00916689e-002 9.67559114e-002
2 2. -9.77241325e-003 0.06292072e-002 0.94899105e-003 5.13229044e-002
3 3. 5.98193922e-003 -8.41211991e-003 6.169048816 4.169208785
4 4. 2.79957587e-003 -8.3195684e-004 5.185089469 2.185214371
5 5. 4.77241325e-003 -5.06292072e-002 -1.94899105e-003 3.13229044e-002
6 6. 5.05900494e-002 -2.53490478e-002 2.00916689e-002 3.67559114e-002
7 7. -4.03850328e-003 5.24337929e-003 -5.280406982 5.280571362
8 8. -1.38934723e-003 3.12915198e-003 -2.274678171 2.274854119
Could you help me with it? Below is an example of script which reads it, but incorrently and I was not able to correct it.
d=dir('*.txt'); % all .txt files in working directory
N=length(d) % how many did we find?
A=zeros(24,N); % allocate for 24 points of data 1 column/file
for k=1:N
[fid,msg]=fopen(d(k).name,'r'); % open for read permission
if fid<0, error(['Failed fopen: ' d(k).name msg]),end % check opened it
A(:,k)=cell2mat(textscan(fid, '%*d %f', ...
'headerlines',1, 'collectoutput', 1));
fid=fclose(fid);
end
;
A

채택된 답변

Mathieu NOE
Mathieu NOE 2023년 8월 30일
hello
maybe this is what you want
A is now a cell array of structure that you can further expand if you need , for the time being you get the info of what txt file it's related and the data
for example here we have one file so
>> A{1}
struct with fields:
name: 'A16.txt'
data: [8×6 double]
and the data :
>> A{1}.datas =
1.0000 1.0000 -0.0206 0.0953 -0.0501 0.0968
2.0000 2.0000 -0.0098 0.0006 0.0009 0.0513
3.0000 3.0000 0.0060 -0.0084 6.1690 4.1692
4.0000 4.0000 0.0028 -0.0008 5.1851 2.1852
5.0000 5.0000 0.0048 -0.0506 -0.0019 0.0313
6.0000 6.0000 0.0506 -0.0253 0.0201 0.0368
7.0000 7.0000 -0.0040 0.0052 -5.2804 5.2806
8.0000 8.0000 -0.0014 0.0031 -2.2747 2.2749
d = dir('*.txt'); % all .txt files in working directory
N = length(d) % how many did we find?
for k=1:N
filename = d(k).name;
A{k}.name = filename;
A{k}.data =readmatrix(filename);
end
A{1}
  댓글 수: 4
Stephen23
Stephen23 2023년 8월 30일
편집: Stephen23 2023년 8월 30일
Rather than creating an inefficient cell array of scalar structures, you can simply use the structure array which already exists in your code:
d = dir('*.txt'); % d is a structure array
for k = 1:numel(d)
d(k).data =readmatrix(d(k).name);
end
This is more robust, uses less memory, creates fewer variables, no data duplication, and is more versatile:
Mathieu NOE
Mathieu NOE 2023년 8월 31일
편집: Mathieu NOE 2023년 8월 31일
yes indeed ! my brain wasn't working well that day
you're always right !

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