How to create a file and append a suffix?

How do you create a new file by appending a suffix like '.txt' or '.dat' etc. to an old file and then delete (to automate it - i.e. through MATLAB) the new file when you're done analyzing it? (I ask this because I have a large file that has a non-standard file type that I don't think I can open otherwise.)

[Stephen23]

"I ask this because I have a large file that has a non-standard file type that I don't think I can open otherwise"

How are you reading file? It is unlikely that you need to copy the file like that: e.g. all of READTABLE et al have the option of specifying the filetype, which would likely be much simpler than messing around with copying files.

Please upload a sample file by clicking the paperclip button. It does not need to be the complete file, just enough to be representative of the file format. Append .txt to the file extension (do not remove or change anything else).

Answer 1

[Arif Hoq]

% suppose you have a excel file with name "example"
A=readtable('example.xlsx')
% analyze what you want
% save the file
writetable('Your variable/output','example.xlsx')
delete('example.xlsx')

[L'O.G.]

But how do I append a suffix without reading the file first? My problem is, as I mentioned, I have a non-standard file format. I can't read it without applying first a ".txt" suffix.