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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Logistic Regression in Mahout
Date Wed, 30 Jan 2013 20:01:37 GMT
What classes are you using and how are you using them?

How are you producing the training vectors?

On Wed, Jan 30, 2013 at 4:12 AM, Prabhu <prabhu@mediaiqdigital.com> wrote:

> Hi all,
>
>     I am trying to use Mahout to run logistic regression analysis on some
> data. The data is about 7 Million rows, with about 20 predictor variables
> (all of them numeric).  The target variable is Boolean - 0 or 1.
>
> I run a logistic regression with this data on R and I get good
> co-efficients
> which makes sense. But when I  run a logistic regression on the exact same
> data using Mahout, I get co-efficients that don't make sense. For a start,
> all co-efficients are negative. The interesting thing is that the
> co-efficient (from R) for the most important variable (with highest
> co-efficient) has the least negative value in Mahout. Can someone please
> help me understand what the cause of the problem is?
>
>
>
> Thanks
>
> Prabhu
>
>
>
>

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