ADD FILES
Per input file:
/FILE={*,’file_name’}
[/RENAME=(src_names=target_names)…]
[/IN=var_name]
[/SORT]
Once per command:
[/BY var_list[({D|A})] [var_list[({D|A})]…]]
[/DROP=var_list]
[/KEEP=var_list]
[/FIRST=var_name]
[/LAST=var_name]
[/MAP]
ADD FILES adds cases from multiple input files. The output,
which replaces the active dataset, consists all of the cases in all of
the input files.
ADD FILES shares the bulk of its syntax with other PSPP commands for
combining multiple data files. See Common Syntax,
above, for an explanation of this common syntax.
When BY is not used, the output of ADD FILES consists of all the cases
from the first input file specified, followed by all the cases from
the second file specified, and so on. When BY is used, the output is
additionally sorted on the BY variables.
When ADD FILES creates an output case, variables that are not part of
the input file from which the case was drawn are set to the
system-missing value for numeric variables or spaces for string
variables.