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How to write cell array into a csv file

Jalaj Bidwai さんによって質問されました 2013 年 4 月 5 日
最新アクティビティ TripleSSSS さんによって 回答されました 2019 年 4 月 4 日
Hello Everyone, I have a cell array C where the first row is string and the remaining rows contain numbers. How do I write the variable C into a CSV file?
For example,
c = {'abc' 'def' 'ghk';[23],[24],[67];[87],[13],[999];[656],[6767],[546]};
Thanks

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8 件の回答

Cedric Wannaz
回答者: Cedric Wannaz
2013 年 4 月 5 日
編集済み: MathWorks Support Team 2018 年 11 月 27 日
 採用された回答

To write the data in C to a CSV file. Use “writetable” in combination with the “cell2table” function.
% Convert cell to a table and use first row as variable names
T = cell2table(c(2:end,:),'VariableNames',c(1,:))
% Write the table to a CSV file
writetable(T,'myDataFile.csv')
For more information see:

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Jalaj Bidwai 2013 年 4 月 6 日
Thanks guys..for replying and giving the solution..Thankyou very much
Image Analyst
2015 年 10 月 19 日
Sara Khalifa's flag moved here:
Great Solution. Thanks!
Bidisha Das 2018 年 8 月 29 日
What if I want the csv file in append mode?

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Jon
回答者: Jon
2013 年 4 月 5 日

You could do it as follows with fprintf
c = {'abc' 'def' 'ghk';[23],[24],[67];[87],[13],[999];[656],[6767],[546]};
fid = fopen('junk.csv','w')
fprintf(fid,'%s, %s, %s\n',c{1,:})
fprintf(fid,'%f, %f, %f\n',c{2:end,:})
fclose(fid)

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Cedric Wannaz
2013 年 4 月 8 日
I don't know if the OP will read your comment, but thank you for the information; I didn't know EXPORT.
Jalaj Bidwai 2013 年 4 月 8 日
Jonathan,Fanstastic. Both of the ways have worked for me..Thank you for the help..I really aprreciate it...
Jonathan, Perfect! Thanks so much for your input.

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Azzi Abdelmalek
回答者: Azzi Abdelmalek
2013 年 4 月 5 日
編集済み: Azzi Abdelmalek
2013 年 4 月 5 日

use csvwrite functionn

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Jon
2013 年 4 月 5 日
csvwrite only works on numeric arrays, not cell arrays with strings and numbers
Youcef Yahiaoui 2015 年 9 月 19 日
Azzi,good to see your comments here. I usually use fprintf(fid...) for the first header lines then use csvwrite with the option -append...

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Zumbo_123
回答者: Zumbo_123
2016 年 1 月 7 日

Alternatively, you could use the method developed by Sylvain Fiedler. Below is the link to the file. It works with empty cells, numeric, char, string and logical cells. One array can contain all of them, but only one value per cell.

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回答者: Peter Farkas 2017 年 10 月 9 日

Convert to table and use writetable function T = cell2table(c(2:end, :)); T.Properties.VariableNames = c(1:end, :); writetable(T, res.csv);

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回答者: Aaron Thrasher 2018 年 4 月 20 日

I came to this page looking for an answer and found that all solutions were very slow for large arrays that include numeric and char based cell arrays of non-standard combinations. Instead, I created my own based off of previous comments and other research. I hope this helps someone as it has helped me reduce the time significantly.

function cellWrite(filename,origCell)
% save a new version of the cell for reference
modCell = origCell;
% assume some cells are numeric, in which case set to char
iNum = cellfun(@isnumeric,origCell);
%% Method 1 using indexing and straight conversion = 7 sec
tic
modCell(iNum) = cellstr(num2str([origCell{iNum}]'));
% toc
%% Method 2 using arrayfun = 25 sec
% tic
% modCell(iNum) = arrayfun(@num2str,[origCell{iNum}],'unif',0);
% toc
% tic
[rNum,cNum] = size(origCell);
frmt = repmat([repmat('%s,',1,cNum-1),'%s\n'],1,rNum);
fid = fopen(filename,'w');
fprintf(fid,frmt,modCell{:});
fclose(fid);
toc
end

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Aaron Thrasher 2018 年 4 月 20 日
Correction to the code - the cell needs to be transposed before writing because the data is written left to right vs. matlab reading cell top down.

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回答者: Yoram Segal 2018 年 8 月 27 日

convert the cell to a table and save the table as CSV
TT = array2table(C,'VariableNames',{'abc' 'def' 'ghk'});
writetable(TT,filename);
To read it back you can use TT = readtable(filename)

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回答者: TripleSSSS 2019 年 4 月 4 日

Matlab now support write from cell array to file
please check: writecell

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