python processor, use the FID field or any other sequential field
>>> from math import fmod
>>> for i in range(20):
... if fmod(i,2) == 0:
... print 0
... else:
... print 1
...
0
1
0
1
0
1
.......etc
1
0
1
0
1
0
1
>>>
python parser, enable the code block this is the function to use and in the expression box you could use ones_zeros(!FID!) (ps... haven't tried the code block but the above python syntax is the key
from math import fmod
def ones_zeros(your_field):
if fmod(your_field,2) == 0: print 0
else: print 1
