How can I format columns when writing to a text file?

I have a 128x19461 double that I want to save as a text file.

I am using:

output = evalc('A'); % A is the matrix
fid = fopen('SamplesTimestampsnew.txt', 'wt');
fwrite(fid, output);
fclose(fid);

This saves it to the text document, but it formats it as "columns 1 through 6, columns 7 through 13" etc.

What am I missing here? Surely it must be simple! Thank you.

Answer 1

[Kyle Pastor]

Hey Conor,

I think what is happening is that it is converting the output of printing A into the console as a block of text. So basically it is just showing you what Matlab would print on the console.

May I suggest the following:

1. Take your matrix of doubles (A) and convert it into a table
2. use the writetable(A) command,

Notes on table:

https://www.mathworks.com/help/matlab/matlab_prog/create-a-table.html

See code below:

A=rand(10,10); % Random 10x10 array of doubles
A = table(A); % converts it into a table (now you can even rename columns)
writetable(A,'./SamplesTimestampsnew.csv');

And there you should have a nice .csv formatted table!

Hope this helps!

[Conor Dixon]

Thanks Kyle!