If specified, @subcmd{MATRIX IN} must be followed by @samp{COV} or @samp{CORR},
then by @samp{=} and @var{file_spec} all in parentheses.
@var{file_spec} may either be an asterisk, which indicates the currently loaded
-dataset, or it may be a filename to be loaded. @xref{MATRIX DATA}, for the expected
+dataset, or it may be a file name to be loaded. @xref{MATRIX DATA}, for the expected
format of the file.
The @subcmd{/EXTRACTION} subcommand is used to specify the way in which factors (components) are extracted from the data.
For the purposes of this tutorial, it is assumed that you are using @pspp{} in its
interactive mode from the command line.
However, the example commands can also be typed into a file and executed in
-a post-hoc mode by typing @samp{pspp @var{filename}} at a shell prompt,
-where @var{filename} is the name of the file containing the commands.
+a post-hoc mode by typing @samp{pspp @var{file-name}} at a shell prompt,
+where @var{file-name} is the name of the file containing the commands.
Alternatively, from the graphical interface, you can select
@clicksequence{File @click{} New @click{} Syntax} to open a new syntax window
and use the @clicksequence{Run} menu when a syntax fragment is ready to be