Re: CLEAR TRANSFORMATIONS ?

[John Darrington]

On Sat, Jun 30, 2007 at 07:55:27AM -0700, Ben Pfaff wrote:
     John Darrington <address@hidden> writes:
     
     > We currently don't implement the CLEAR TRANSFORMATIONS command.
     >
     > To me it would appear trivial to do so.  Is there subtle thing that
     > I've overlooked?  If not I'll go ahead and implement it.
     
     There are a few subtleties I think.  First, I don't think we save
     a copy of the dictionary that corresponds to the active file.
     We'd need to do so, and then restore it for CLEAR
     TRANSFORMATIONS.
     
     Second, some transformations are not exposed to the user and
     should not be cleared.  The specific one I have in mind is the
     DESCRIPTIVES transformation that produces Z scores.  As far as
     the user is concerned that transformation doesn't exist so it
     shouldn't be cleared.
     
Maybe I'd better leave it alone for now.

J'


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