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Unable to read data with .clv extension

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Mar
Mar 2018 年 7 月 26 日
コメント済み: KALYAN ACHARJYA 2018 年 7 月 30 日
Hi,
I am trying to import multiple csv files into Matlab (.csv extension) but I am keep getting an empty structure.
Following online suggestions I used the following line of code:
d = dir('/Users/file_*.clv');
images = arrayfun(@(f) csvread(f.name), dircontent, 'UniformOutput', false);
image = cat(3, images{:});
For some reason seems like Matlab doesn't read the data. I got the following when I checked the size(image). I was expecting a 3D array instead.
ans =
0 0
Below the code I used with the .csv extension:
d = dir('/Users/file_*.csv');
images = arrayfun(@(f) csvread(f.name), dircontent, 'UniformOutput', false);
image = cat(3, images{:});
I got the following error:
>> mult_csv
Error using csvread (line 35)
File not found.
Error in mult_csv>@(f)csvread(f.name)
Error in mult_csv (line 8)
images = arrayfun(@(f) csvread(f.name), dircontent, 'UniformOutput', false);
Any ideas?
P.S. I attached an example of my csv files.

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Stephen Cobeldick
Stephen Cobeldick 2018 年 7 月 26 日
"For some reason seems like Matlab doesn't read the data."
None of the code you have shown reads any file data into MATLAB. Either you have forgotten to show us the code that you actually use to import that data, or you need to read the documentation on how to import data:
Mar
Mar 2018 年 7 月 26 日
I've edited my post to make things more clear. I also attached a file as requested.
Guillaume
Guillaume 2018 年 7 月 26 日
Oh, so this is just a continuation of import-multiple-csv-files-in-matlab.
For some reason, I missed that you commented there (There was a problem yesterday where the activity feed stopped updating for a few hours). I've now updated my answer.

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回答 (1 件)

KALYAN ACHARJYA
KALYAN ACHARJYA 2018 年 7 月 26 日
編集済み: KALYAN ACHARJYA 2018 年 7 月 30 日
% Please save all files name in symmetrically before doing the operation
%keep in all one folder, so you avoid the confusion with others files
% names for example f1,f2,f3...
%Save the folder of files in the current directory
path_directory='folder_name_here';
% Pls note the format of files,change it as required
original_files=dir([path_directory '/*.file_extention_format']);
for k=1:length(original_files)
filename=[path_directory '/' original_files(k).csv];
file(k)=csvread (filename);
% Next do your operation and finding
end

  3 件のコメント

KALYAN ACHARJYA
KALYAN ACHARJYA 2018 年 7 月 26 日
If your job to load all files, loop do the same. It loads the all csv files from the folder. % Next do your operation and finding outside the loop.
Guillaume
Guillaume 2018 年 7 月 26 日
Note that if the files are csv files, xlsread is the slowest possible way to read these files. csvread would be much faster.
KALYAN ACHARJYA
KALYAN ACHARJYA 2018 年 7 月 30 日
Thanks @Guillaume

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