?? initial values

? alpha
0.5
# just a comment line...
? x 1:21 1:4
0 0 1 1
0 0 1 1
0 0 1 1
1 0 1 1
1 0 1 1
1 0 1 1
1 0 1 1
0 0 1 1
0 0 1 0
0 0 0 0
1 0 0 0
1 0 1 0
0 0 1 1
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 1 0