octave> a = rand(3,1)
a =
0.482342
0.088919
0.552035
octave> [fid, msg] = fopen("test.dat","w","native")
fid = 3
msg =
octave> fprintf(fid, "%f %f %f", a(1), a(2), a(3))
ans = 2
octave> fclose(fid)
ans = 0
octave:1> [fid, msg]=fopen("test.dat", "r", "native");
octave:2> [a,b,c]=fscanf(fid, "%f %f %f", "C");
octave:3> a
a = 0.48234
octave:4> b
b = 0.088919
octave:5> c
c = 0.55204