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From deneche abdelhakim <adene...@gmail.com>
Subject Re: Random Forest support blank values?
Date Tue, 27 Nov 2012 07:46:21 GMT
The current implementation doesn't support sparse format.

What do you mea blank values aren't missing values ? in all cases, the
current implementation just skips any record with missing values.


On Tue, Nov 27, 2012 at 8:40 AM, Qinghao Dai <rogerdai16@gmail.com> wrote:

> Hello,
> I am trying to train Random Forest in Mahout, by a arff file in sparse
> format.
> Some records contain blank values.
> Not missing value(?). I can replace missing value with other values.
> For example. A record like this:
> {32 1, 45 0, 100 20}
> This record in sparse format means, the 33th attribute is 1, the 46th
> attribute is 0, and the 101st attribute is 20. And all others are blank
> values.
> I am transform this data file into non-sparse format, but Can I just take a
> sparse format as input?
> --
> Best Regards,
> Qinghao
>

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