Hi All,
In itemsimilarity metod tere is a parameter like:
--maxPrefs (-mppu) maxPrefs max number of
preferences to
consider per user or
item, users or items
with more preferences
will be sampled down
(default: 500)
How does it work exactly?
If I have 5 mln users and 5000 items and I run itemsimilarity with default
maxPrefs, it consider only 500 ranks from those 5 mln or what? Is it sampling?
What can I do to force calculation for all input data?
M1 M2 M3 .... M5000
U_1
U_2
...
U_5000000
What does mean "or" in definition:
"max number of preferences to consider per user or item"
Thx in advance
Natalia
