Hello everyone
I'm a novice at Mahout, and I meet some problems in PFP.
There is always only one reduce task in ParallelFPGrowth.
How can I set the number of reduce tasks in PFP?
Thanks a lot!
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Edit the source code as u like.
在 2012-4-29，下午7:06，Omi omi7...@gmail.com 写道：
Hello everyone
I'm a novice at Mahout, and I meet some problems in PFP.
There is always only one reduce task in ParallelFPGrowth.
How can I set the number of reduce tasks in PFP?
Thanks a lot!
--
View this
Thanks a lot
yang
On Fri, Apr 27, 2012 at 6:03 PM, Ted Dunning ted.dunn...@gmail.com wrote:
It is determined automagically by an evolutionary process.
From what I hear, it has a tendency to do a good job on regularization and
a bad job on learning rate optimization.
On Fri, Apr 27, 2012 at
Just wondering, what does mahout do for user/item pairs that do not have a
rating? Does it fill it in with some average value? fill with zeros? something
else?
On Apr 25, 2012, at 4:26 PM, Sean Owen wrote:
I don't know what the particular issue is; I imagine there's something
that needs some
It depends a bit on the algorithm. The matrix-based approaches
naturally implicitly assume 0. The similarity-based ones don't assume
any value at all and missing data is ignored, not inferred. (But you
can make it infer values if you want. But it's not helpful in
general.)
On Sun, Apr 29, 2012 at
ah sorry, I meant in the context of the SVDRecommender.
Your earlier email mentioned that the DataModel does NOT do any subtraction,
nor add back in the end, ensuring the matrix remains sparse. Does that mean it
inserts zero values?
On Apr 29, 2012, at 2:24 PM, Daniel Quach wrote:
Just
They're implicitly zero as far as the math goes IIRC
On Sun, Apr 29, 2012 at 10:45 PM, Daniel Quach danqu...@cs.ucla.edu wrote:
ah sorry, I meant in the context of the SVDRecommender.
Your earlier email mentioned that the DataModel does NOT do any subtraction,
nor add back in the end,
Great, that helps! I'll just go ahead with the output file then and see
what kind of results I get.
Thank you!
On Fri, Apr 27, 2012 at 12:36 PM, Jeff Eastman
j...@windwardsolutions.comwrote:
I think the answer to this question lies in how Dirichlet works: During
each iteration, all points are
I had a nice week playing with the Mahout CF Libray and its MySQLJDBCDataModel
to get the input data from a database.
But then this idea occurred to me. I have another sever with similar data sets,
which is running another database server, Oracle, namely.
I'm wondering how I can combine
On Mon, Apr 30, 2012 at 1:36 AM, Amrhal Lelasm arm...@hotmail.com wrote:
I'm wondering how I can combine these two to get the input data for my
recommender engine. Do, I start by implementing the the JDBCDataModel or ?
Yes.
I appreciate any insight you might have for this?
Sounds like
reducer or reduce tasks?
In PFP, there is a parameter called groups.
For each group, PFP will generate a reduce task, not a reducer.
You can specify how many reducer you want via modifying your xml
configuration file in hadoop.
Regards,
Q
2012/4/29 Wenhao Xu wenhao...@gmail.com
Edit the
Can you connect to an Oracle database? sure, just do so. I think the
SQL just works, but you'll find out.
On Mon, Apr 30, 2012 at 2:36 AM, Amrhal Lelasm arm...@hotmail.com wrote:
I had a nice week playing with the Mahout CF Libray and its
MySQLJDBCDataModel to get the input data from a
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