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From Manuel Blechschmidt <>
Subject Re: time based price predictions
Date Fri, 28 Dec 2012 09:39:59 GMT
Hi Matt,
you can model the problem for price prediction as a time series problem. Currently Mahout
has no direct support yet for time series like e.g. R

Like Ted already said you have a kind of regression problem. Currently there are not a lot
of people doing directly regression with mahout. Most of the classification implementation
are also suitable for regression. Nevertheless if you do not have a Ph.D. in statistics it
will be tough to transfer the classification algorithms to regression algorithms. I would
currently say that a good start for you are ARIMA models:

As far as I know there is no ARIMA implementation in Mahout.

If you want to include events e.g. modeling the price drop of a certain product when the successor
is introduced it becomes tricky. You can check out project Black Swan
They try to correlate events like changing governments with e.g. tax increase.

Here is also an answer from me directly for time series analysis:

To sum it up: There is currently no good support for time series analysis in Mahout. Get you
hands dirty and implement it or use R.

Hope that helps

On 27.12.2012, at 16:26, Matt Mitchell wrote:

> I'm looking for a way to predict prices based on day of the week, and
> possibly even buckets of days like weekends, holidays etc.. I have the data
> (item-id, price, date) ... Does anyone have any advice for how to get
> started with this using Mahout?
> Thanks,
> Matt

Manuel Blechschmidt
M.Sc. IT Systems Engineering
Dortustr. 57
14467 Potsdam
Mobil: 0173/6322621

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