changing fileextension of .in to .txt

hello people,

i need to edit a text file (example.in) with I/O functions but matlab doesn't support .in files so i need to change the extension to .txt and afterwards back to .in. how is that possible?

thanks a lot Cyros

Answer 1

[Michael Haderlein]

Dear Cyros,

what do you mean "matlab doesn't support"? You can open a file with random extension by fopen('filename.extension') and then use all I/O functions with the fid provided by fopen.

Best regards,

Michael

[Cyros]

Dear Michael, the file im using is example.in (input file). using fopen for that file returns -1, so i need to change the extension. i cant even attach this file here, "File format is unsupported".

Answer 2

[Cyros]

! ren example.in example.txt works

Answer 3

[Michael Haderlein]

I don't know what your code is, but when I save a textfile "example.in" containing just the line "1" and then open the file, I get exactly the answer "1":

fid=fopen('example.in');fgetl(fid), fclose(fid);

ans =

1

fid=-1 usually means that the file is not found. Maybe you didn't give the correct path to the file or have a typo in the filename.

Best regards,

Michael