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From Stuti Awasthi <stutiawas...@hcl.com>
Subject RE: MatrixMultiplicationJob Input query
Date Mon, 14 Jan 2013 10:35:26 GMT
Hi Ashish,

Im running the job like this :

mahout matrixmult --inputPathA  --numRowsA <Rowno of MatrixA> --numColsA <Column
no of MatrixA> --inputPathB <Inputpath of MatrixB>  --numRowsB <Rowno of MatrixB>
--numColsB <Column no of MatrixB> --tempDir <temporaryDir path>

And getting the errors of InputFormat in mapper as mapper expects <TupleWritable> format.
Now here Im not sure that what should be the keys  and Value<TupleWritable> as Input
to mapper to get this job working. 

-Stuti


-----Original Message-----
From: ashish negi [mailto:ashishnegioffice@gmail.com] 
Sent: Monday, January 14, 2013 2:29 PM
To: user@mahout.apache.org
Subject: Re: MatrixMultiplicationJob Input query

Could you tell how are you trying to run the job?

Regards,

On Mon, Jan 14, 2013 at 1:42 PM, Stuti Awasthi <stutiawasthi@hcl.com> wrote:

> Hi Ashish,
> I tried to run the "matrixmult" example of Mahout but getting errors 
> in input format. I want to create the input file of matrix in the 
> format which is required by MatrixMultiplicationJob for further 
> processing. Im facing issues in creating that file as I have doubts 
> that what will be the key and values for the input file. Anybody's help will be appreciated.
>
> Thanks
> Stuti
>
> -----Original Message-----
> From: ashish negi [mailto:ashishnegioffice@gmail.com]
> Sent: Monday, January 14, 2013 1:04 PM
> To: user@mahout.apache.org
> Subject: Re: MatrixMultiplicationJob Input query
>
> Hi Stuti,
>
> I am not with specific answer of your question but why don't you try 
> few examples to guess the algorithm or browse source code.
>
> Regards,
> Ashish
>
> On Mon, Jan 14, 2013 at 12:20 PM, Stuti Awasthi <stutiawasthi@hcl.com
> >wrote:
>
> > Hi,
> > I want to execute MatrixMultiplicationJob provided in Mahout. I 
> > understand that the input file should be in SequenceFileFormat with 
> > input Key as IntWritable and Value as TupleWritable.
> >
> > If my matrix is  2x3 like :
> >
> > A =  1 2 3
> >         4 5 6
> >
> > What should I keep as key and value in SequenceFileFormat so that I 
> > can provide it in MatrixMultiplicationJob as input. Sorry for the 
> > basic question but Im new to Mahout and not finding much details of 
> > MatrixMultiplicationJob execution.
> >
> > Thanks
> > Stuti
> >
> >
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