FREQUENCIES: Modernize syntax and improve chart support.
The FREQUENCIES syntax was carrying a lot of baggage from old versions
that is no longer mentioned in the SPSS syntax reference. This commit
removes support for those obsolete features.
The implementation only supported a single chart at a time. Now it
supports pie charts and histograms in a single command. The MIN and
MAX format options are now implemented, as are the MISSING/NOMISSING
options for pie charts. (The FREQ/PERCENT options are still not
implemented.)
Also update documentation to match.
projects / pspp / commit