3 to 20 Spaced Treatments (same treatments not
above or sideways to each other) in equal
numbers in grid of up to 300 positions (15x20)

Enter number of Grid Rows ( 3 to 15 ):
Enter number of Grid Columns ( 3 to 20 ):
Enter number of Treatments ( 3 to 20 ):

JavaScript © 1997 by John A. Byers, Chemical Ecology
modified from BASIC code in:

Byers, J.A. 1991. BASIC algorithms for random sampling and treatment
     randomization. Computers in Biology and Medicine 21:69-77.

other related programs:
Byers, J.A. 1993. Randomization algorithms in BASIC for experimental
     design. Computers in Biology and Medicine 23:167-176.

Byers, J.A. 1996. Random selection algorithms for spatial and temporal
     sampling. Computers in Biology and Medicine 26:41-52.