Re: getting case count via PSPP::Perl

[John Darrington]

It should be very straightforward.   Most .sav files contain a header field 
indicating the number of cases.  However, occasionally we've encountered files
which don't have this field.  So the perl program would have to be prepared to
handle this case.

J'

On Fri, May 20, 2011 at 11:16:26AM -0700, Rob Messer wrote:
     We have been using the PSPP::Perl interface to read data from .sav files 
into our database, and it works very well for that purpose.
     
     Sometimes the files we read are rather large, and so it takes some time to 
load the data.  We like to be able to show progress to the user who is loading 
their data, so we need to know the total number of records to be loaded.  But 
right now, there doesn't appear to be any way to get the total number of cases 
other than scanning through all the records.  Is there any way to add a method 
to the Perl API so that we could do something like this:
     
     my $pspp = PSPP::Reader->open($file);
     my $case_count = $pspp->get_num_cases(); 
     
     # then load cases to database and show percent complete at various 
points...
     
     
     Thanks,
     
     Rob
     
     
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