Displaying 4 results from an estimated 4 matches for "get_maxextra".
2013 Feb 19
2
Implementing tf-idf weighting scheme in Xapian
...nts .Also,the higher the
within document frequency in the document ,more is the weight given by the
term to the document.
The basic formula is W(t,d)=wdf* log(N/termfreq) .
However,various normalizations can be applied to both wdf and idf.
The extra per document component will be 0 here and so get_maxextra( ) will
return 0 .
Moreover,an upper bound on W(t,d) for get_maxpart( ) can be found out
easily for a particular normalization (if I have all the required metrics
available).
For eg:- If I am using logarithmic normalization for the wdf (within
document frequency) ,then an upper bound on W(t,d) w...
2011 Mar 08
1
MSet order
Hello
I defined a weighting scheme to simulate a king of "euclidean" distance.
To test it, i used a database with 1000 documents.
If I run :
enquire.set_weighting_scheme(MyWeight());
Xapian::MSet matches = enquire.get_mset(0, 1000);
I have a correct list of results.
But if I run Xapian::MSet matches = enquire.get_mset(0, 10);
I don't have the top-10 results.
If I run Xapian::MSet
2012 Jul 17
1
Can not use custom weight scheme with python binding
...ght):
def __init__(self):
pass
def name(self):
return "Tinker"
def serialize(self):
return ""
def get_sumpart(*args):
return 1
def get_maxpart(*args):
return 1
def get_sumextra(*args):
return 0
def get_maxextra(*args):
return 0
... ...
enquire.set_weighting_scheme(TinkerWeight())
But is throws this error:
*in method 'Enquire_set_weighting_scheme', argument 2 of type
'Xapian::Weight const &'*
Could anyone help me to solve this? Thanks a lot.
2009 Jan 27
1
Segmentation fault in MSetIterator get_weight
Hi,
I'm using xapian with c# and mono and i'm having a segfault in get_weight.
When i print the index variable, the value is clearly too high.
I think something write over it. Do you have any idea on how i could
trace the beginning of the segmentation fault ?
Thanks,
--
Yann