snapsift                          Select bodies obeying predicate

  in=???                          Input snapshot file name

  out=???                         Output snapshot file name

  times=all                       Range of times to process

  sieve=i%4==0                    Predicate to select bodies

  require=                        Input items required

  produce=                        Output items produced

  passall=true                    If true, pass on input data

  seed=                           Seed for random number generator

  VERSION=2.1                     Josh Barnes  10 February 2011

Joshua E. Barnes      (barnes at
Created: 14 June 2012
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