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writetable() to change header and append cell array in each row

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I have a cell array made of cell array tables such that
testarray
= 1×2 cell array
{1×3 table} {1×3 table}
And
testarray{1}
= 1×3 table
Var1 Var2 Var3
___________________________________ ______ ______
'1' '2' '3'
testarray{2}
= 1×3 table
Var1 Var2 Var3
___________________________________ ______ ______
'3' '4' '5'
And desired header to be
col1 col2 col3
How do I use writetable() to write this in excel that looks like
col1 col2 col3
1 2 3
3 4 5
Thank you!!

Accepted Answer

chlor thanks
chlor thanks on 4 May 2021
summary = vertcat(testarray{:});
summary.Properties.VariableNames = { col1', 'col2', 'col3'}
writetable(summary, 'summary.xlsx');

More Answers (1)

Scott MacKenzie
Scott MacKenzie on 4 May 2021
t1 = table({'1'}, {'2'}, {'3'});
t2 = table({'4'}, {'5'}, {'6'});
t1.Properties.VariableNames = { 'col1', 'col2', 'col3' };
testarray = {t1, t2};
writetable(testarray{1}, 'test.txt');
writetable(testarray{2}, 'test.txt', 'writevariablenames', false, 'writemode', 'append');
In the command window...
>> type test.txt
col1,col2,col3
1,2,3
4,5,6
  2 Comments
Scott MacKenzie
Scott MacKenzie on 4 May 2021
Gee, that's weird. I just re-ran the code, no problem. writetable dates to R2013a, so that's unlikely an issue. Of course, t2 did not append becuase the 2nd writetable crashed. I really don't know what the issue. If somone else reads this and has an idea, perhaps they'll weight in.

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