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From Zhou Jiang <jz.bel...@gmail.com>
Subject Re: Is it possible to use Mahout Random Forests work with image(pixel) data in libsvm format?
Date Wed, 19 Aug 2015 05:29:44 GMT
Thank you for your reply. But the data is very sparse and reformat the input file means add
a lot of zero, which will affect the performance.
To me, it’s better to stick to the sparse representation.

> On Aug 18, 2015, at 10:15 PM, Ted Dunning <ted.dunning@gmail.com> wrote:
> 
> Seems like a simple format translation.
> 
> Why not just reformat the input file?
> 
> 
> 
> On Tue, Aug 18, 2015 at 7:42 PM, Zhou Jiang <jz.belief@gmail.com> wrote:
> 
>> Hi All,
>> 
>> The Default Random Forests MapReduce works with UCI glass data.
>> 
>> ID f1 f2 f3 … fn L
>> 
>> Is there a way to make it work with image data in libsvm format(Sparse
>> Representation) listed as blow:
>> 
>> L index1:feature1 index2:feature2 … indexk:featurek
>> 
>> 
>> Thanks
>> 
>> 


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