saving data without the header

[Jean Dupont]

When saving data produced with octave like this:
save('mydata.dat','y');

the file mydata.dat always starts with a header like this:

# Created by Octave 3.2.4, Fri Jan 20 20:08:08 2012 CET <address@hidden>
# name: y
# type: matrix
# rows: 69
# columns: 5

Is there a possibility to suppress this header?

thanks
Jean