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Re: getting case count via PSPP::Perl
From: |
Rob Messer |
Subject: |
Re: getting case count via PSPP::Perl |
Date: |
Mon, 23 May 2011 11:09:24 -0700 |
Ok, I have done that (although I didn't see a category called "wishlist" so I
just put as "other", since it is really a feature request and not a bug).
Thanks.
On May 23, 2011, at 10:51 AM, Ben Pfaff wrote:
> It would be ideal if you would file this as a "wishlist" bug in
> the tracker at https://savannah.gnu.org/bugs/?group=pspp. That
> way the request will not get lost.
>
> Rob Messer <address@hidden> writes:
>
>> John,
>>
>> Ok, that is good to know. So I guess consider this a feature
>> request to add that to some future release. If the method
>> sometimes returns undef because the file header doesn't have
>> the info that then is reasonable enough, but at least we could
>> show progress in most cases. Thank you,
>>
>> Rob
>>
>> On May 22, 2011, at 1:20 AM, John Darrington wrote:
>>
>>> 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
>>>
>>
>>
>> _______________________________________________
>> Pspp-users mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/pspp-users
>>
>
> --
> Ben Pfaff
> http://benpfaff.org