write trajectory <write-trajectory-statement> end

<write-trajectory-statement> :==

  [next]
  --{Appends the current coordinate set to the trajectory file.
     Only to be used for subsequent calls.}
  [reset]
  --{Terminates writing to the trajectory file and initializes writing
     to another trajectory file.}
  output=<filename>
  --{Output trajectory file.}
  ascii=<logical>
  --{Formatted write. Default=true}
  scale=<real>
  --{Scale factor. Default=10000}
  offset=<real>
  --{Offset. Default=800}
  format=<format>
  --{Format. Default=12z.6}
  selection=<atom-selection>
  --{The selected atoms are written to the trajectory.}