How to write a matrix to a .txt file without overwriting the text file in MATLAB 2019a?

I have used writematrix function which has a parameter 'WriteMode' , 'append'. But WriteMode was introduced in 2020 version onwards. I have 2019 version.

I have a loop that runs about 11000 times and generates 2 matrix each time, both of which are to be appended to a text file. But writematrix function overwrites the text file.

I don't want to create a single matrix and write it to text file in one go as it would consume lot of memeory and slow down the code.

Answer 1

[Jan]

You can write 11'000 files and joint them afterwards.