.mat file to .txt file

I have a .ns5 data file that I want to convert to a .txt file to analyze the data. It is a very large data file (32x 180028044int16) so ive broken it down into 7 samples that are one minute in length (sample 1-7) only with data from channel 2 making each sample 1x1800001int16. I have attached a picture of what my workspace and editor look like from my input. How do i save each sample (1-7) as a .txt file? If i right click them in the workspace right now they only save as a .mat file or .m, but in order for me to analyze the data it needs to be in a .txt file format to be entered into another code.

Answer 1

[per isakson]

A little demo

>> i16 = ones( 12, 1, 'int16' );    % sample data
>> fid = fopen('i16.txt','a');
>> fprintf( fid, '%6d\n', i16 );
>> fclose(fid);
>> type i16.txt
     1
     1
...

[Alexis Thompson]

In the first line where you write i16, is that where I would put the name of the file I am trying to convert?

[per isakson]

No, i16 is the variable that you want to print to the txt-file. Thus, skip the first line and replace i16 by sample1, etc. in the following lines. And skip the last line.

"sample (1-7) as a .txt file" Does that mean ONE txt-file?