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tickbox variable: $statreplampflag -- toggle stat replace
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default: 0 (FALSE)

When statreplampflag is TRUE (stat selected), the
amplitude of complex-valued data is *replaced* by
the value of the stat field.  The stat field is
loaded with:

  setfile val <somefile>
  read_binary_values
  swap_stat_val

Note that this overwrites the val field, so stat
should be loaded before val.  Before loading, the
stat field will be 0.
