I posted v5.1 tutorial slides on the wiki. https://github.com/JohnLangford/vowpal_wabbit/wiki/v5.1_tutorial.pdf after Daniel's bugfix below. The LDA tutorial...
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warezio
Apr 1, 2011 6:55 pm
Hi, I blogged about a (slow!) filter tree reduction which is done in perl using vw as a black box. ...
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dsrosenb
Apr 1, 2011 7:17 pm
Hi, I'd like to use VW in a prediction server setting, where I send in some input, and it sends back the prediction. Any suggestions on how to do this? One...
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John Langford
john_c_langford
Apr 1, 2011 7:35 pm
In linux, this works with "-p /dev/stdout". Does that work on your system? -John...
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dsrosenb
Apr 1, 2011 7:47 pm
Funny - I tried that and it segfaults for me. (I'm on centos linux). I do use that technique in other contexts though, so our /dev/stdout isn't totally...
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John Langford
john_c_langford
Apr 1, 2011 7:50 pm
... VW currently operates in two asynchronous threads: the parser and the learner. In essence, we need to insert an interface between these threads which...
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John Langford
john_c_langford
Apr 1, 2011 7:58 pm
Version? Compile problems? make clean; make? It works for me with v5.1 on ubuntu 10.04: 3:58PM humpty-52: ./vw -d ~/housing/edgemont_sale_prices -p /dev/stdout...
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John Langford
john_c_langford
Apr 1, 2011 8:07 pm
Nikos, I get a "document not found" when looking for the patch. -John...
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John Langford
john_c_langford
Apr 1, 2011 8:58 pm
This is incorporated. Use it with --readable_model <f> Matt, I made the test part a little bit more verbose. You might want to tweak the LDA portion of the...
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Vaclav Petricek
vaclavpetricek
Apr 1, 2011 9:08 pm
To send predictions to stdout you can try: cat input | vw --quiet -i model -p /dev/stdout Vaclav...
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Bharath Krishnan
cqbkrishnan
Apr 1, 2011 9:17 pm
I am trying to understand how this works... I was expecting the output to be similar to the lambda (per-topic word probabilities), but there seems to be some...
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Matt Hoffman
flashrefuse
Apr 1, 2011 9:55 pm
It's transposed from the way it reads in the slides, I'm in the process of changing that. Rows are words, and columns are topics. The reason there are 8192...
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Bharath Krishnan
cqbkrishnan
Apr 2, 2011 1:53 am
Thanks, that makes sense. I could have sworn I was looking at word counts in the readable model before, but it looks like that was just operator error. If your...
The problem seems to have been with the permissions I had for vw. I was originally using: [drosen@beast ]$ ls -al /usr/local/bin/vw -rwxr-x--x 1 root root...
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Ryan Gabbard
rg_bbn
Apr 4, 2011 7:44 pm
Hello everyone, I'm trying to use VW learn topics using LDA on a large number of documents and then classify (much smaller batches of) new documents using that...
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John Langford
john_c_langford
Apr 6, 2011 1:24 am
Why do you expect the predictions to be identical? My intuition is that they would differ. -John...
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Ryan Gabbard
rg_bbn
Apr 6, 2011 3:16 pm
Hello John, ... First, thank you for writing the program. It look very useful. I think I may be misunderstanding how -f and -i work. I assumed that -f saved...
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Bharath Krishnan
cqbkrishnan
Apr 6, 2011 3:43 pm
Hi Ryan, There is a -t option you can use when you just want to test the model (i.e., there is no learning done on the test set). Also, you are assuming that...
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davekale
Apr 6, 2011 6:15 pm
Hey John, it's Dave from CHLA. Thanks again for making time for the LA Machine Learning meetup group and for us folks from CHLA. Great talks, and we had a...
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John Langford
john_c_langford
Apr 6, 2011 6:19 pm
Right, you might need the -t (or equivalently -l 0). VW is aggressive about learning whenever it is exposed to information. You must specifically tell it not...
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John Langford
john_c_langford
Apr 8, 2011 4:19 pm
How do we make this patch work with an ARM architecture? It's seems like an efficient learning algorithm should run on efficient processors. -John...
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Nikos Karampatziakis
nikos.karamp...
Apr 8, 2011 5:31 pm
We can use ifdefs both for Makefiles and C files....
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sanmi.koyejo
Apr 8, 2011 6:50 pm
Hi all, I am using vw with logistic regression and conjugate gradient. 1) I noticed that the vw predictions can be negative. What are the vw test predictions?...
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Nikos
nikos.karamp...
Apr 8, 2011 7:17 pm
Hi Sanmi, Yes the predictions you see are the log odds of y=1. I am not sure why you are getting the error. Is it reproducible in other datasets? -Nikos...
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John Langford
john_c_langford
Apr 8, 2011 7:35 pm
Can you figure out the least inelegant manner to do that? -John...
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John Langford
john_c_langford
Apr 8, 2011 7:45 pm
What's the precise commandline producing the error? -John...
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Nikos Karampatziakis
nikos.karamp...
Apr 8, 2011 8:14 pm
It will be hard for me given I don't have access to a machine that doesn't understand SSE. -Nikos...
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sanmi.koyejo
Apr 8, 2011 8:38 pm
... vw: parser.cc:596: void setup_example(parser*, example*): Assertion `f == ae->atomics[*i].end' failed. Aborted ... The command is: $sw/vw --ignore s...
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sanmi.koyejo
Apr 8, 2011 8:48 pm
Some more detail, I am using 6 namespaces. 2 begin with "s", 3 begin with "c" and one begins with "d". I am re-processing the data to fix this uniqueness...
