How to enter the data into a excel and notepad that always start from a new line?

For example, the first time I run the program and write a data in the excel or notepad file. Then I want to write the data in the same file with starting from a new line without overwrite the first result.

Here is the codes.

fid = fopen('serialno.txt', 'w'); % This portion of code writes the serial no.
fprintf(fid,'%s\n',serialno);      % to the text file, if executed a notepad file with the
    fclose(fid);                      % name serialno.txt will be open with the number plate written.
    winopen('serialno.txt')

Answer 1

[dpb]

fid=fopen('seralno.txt','a+');

See

doc fopen

for details.

[YIP]

THANK YOU. HOW ABOUT EXCEL?

[dpb]

If the above solved your problem, please "Accept" the answer...

As for Excel, that's a horse of a Microsoft color...either use COM or xlswrite with a location(*); they're not sequential text files.

(*) I presume there's some method to find the first empty location if don't keep it externally, but that's an Excel question not Matlab and "I don't do Windows... :) " Look that up in the Help for COM or ask on an Excel newsgroup.