Hi,
take a look at the documentation for fopen, it states:
"fileID = fopen(filename) opensthe file, filename, for binary read access,..."
Since you want to write you need to pass down an additional argument. Depending on what you like to do I guess either 'a' or 'w' is what you are looking. If you call
FID = fopen('file.m','a')
You would open or create new file for writing. Append data to theend of the file.
When you call
FID = fopen('file.m','w')
you would ppen or create new file for writing. Discard existing contents, if any.
