Dr. Simon Thompson
Chief Researcher, Customer Experience.
BT Research.
BT plc. PP11J. MLBG BT Adastral Park, Martlesham Heath.
IP5 3RE
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Hi there,
I've got a couple of questions about the hmm elements of Mahout.
- when I get models that are made of NaN I guess this is telling me that the
algorithm can't make a prediction?
- I can train models with 1 hidden state, or 2 hidden states and once or twice
with 3 hidden states.. but
Hi Ted,
thanks very much for the response, very helpful to hear these thoughts.
What I will do is look at the data set issue and report back as to what I find
out. I'll prod round the code and see if I can get a clue as to how it produces
infinities and so on.
I think that one of the Mahout
Hi,
I've been using the standalone trainer.
I'll have a look at the log scaled trainers - thanks for the tip!
Best,
Simon
Dr. Simon Thompson
Chief Researcher, Customer Experience.
BT Research.
BT plc. PP11J. MLBG BT Adastral Park, Martlesham Heath.
IP5 3RE
Note :
This email contains
Hi there,
Ted's insight on the synthetic data set causing underflow appears to be
correct.
- If I train using a pattern "0 0 0 0 1 1 1 1 2 2 2 2 2 0 0 0 0 1 1 1 1 2 2 2 2
2 <>" for 3 hidden states and 3 observable
states .
>mahout baumwelch -i pattern,txt -o out.txt -nh 3 -no 3
I get
Hello there,
I've had a little look at the Mahout source.
I've been using the mahout command line to train my hmm and this invokes the
org.apache.mahout.classifer.sequencelearning.hmm.BaumWelchTrainer class main
method.
This class then parses the command line options and calls HmmTrainer.
t
Hello - if you are running on top of hdfs then did you use hadoop fs -put to
create the /tmp/mahout-work-kali/movielens/ratings.csv file?
Dr. Simon Thompson
Note :
This email contains BT information, which may be privileged or confidential.
It's meant only for the individual(s) or entity
Hi there,
I am doing a fairly silly experiment to measure hadoop performance. As part of
this I have extracted emails from the Enron database and I am clustering them
using a proprietary method for clustering short messages (ie. tweets, emails,
sms's) and benchmarking clusters in various confi
Hi Ted & Dan,
thanks for coming back to me. I figured it out - I was being dumb!
The short version is that I had a large file (a database results dump) that I
was splitting with awk in a directory called enron-in.
On this occasion I had forgotten to remove it before running "mahout
seqdirect
But why would she want the things she has?
- Original Message -
From: Koobas [mailto:koo...@gmail.com]
Sent: Friday, June 07, 2013 08:06 PM
To: user@mahout.apache.org
Subject: Re: evaluating recommender with boolean prefs
Since I am primarily an HPC person, probably a naive question from
I've not used Mahout to do it, but in the past colleagues have used HMM to
create a way for discovering customers who are in an "about to churn" state,
this was used to populate a target list for winback intervention (they're about
to curn, contact them and offer something - or just help - to ke
Hey Dean,
what do you mean by character n-grams? If you mean things like "&ab" or "ui2"
then given that there are so few characters compared to words is there a
problem that can't be solved without a look-up table for n4 ish because if so then do you run into the issue of
a sudden space explosi
Hi all - there is a project at MIT called FlexGP that has done more work on
this.
http://groups.csail.mit.edu/EVO-DesignOpt/groupWebSite/index.php?n=Site.FlexGP
Unfortunately I can't find a download for the code so I suppose that it's not
opensource, however you might like to contact these fol
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