Insert a header in a txt file

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How can I insert a header in a txt file without deleting the contents and the format of the txt file? I would like simply to insert a header on top of all the columns of data in order to specify the variable of each column.
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Walter Roberson
Walter Roberson on 6 Dec 2021
writetable instead of writematrix.

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Accepted Answer

Alagu Sankar Esakkiappan
Alagu Sankar Esakkiappan on 8 Dec 2021
Hi Emilio,
I see that you're trying to add new Column headers to the same text file without deleting its original content. This may be achieved using writetable function and its properties.
You may refer to the following code snippet as reference:
inputTable = readtable("dataset_red.txt"); % Reads current file contents as a Table
inputTable.Properties.VariableNames = {'Data 1','Data 2','Data 3','Data 4','Data 5','Data 6'} % Add Text Header for Each Column
writetable(inputTable,"dataset_red.txt","Delimiter", '\t'); % Overwrite same Text file with Tab as Delimiter

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