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HDFS, mail # user - Transpose


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Mix Nin 2013-03-05, 15:11
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Sandy Ryza 2013-03-05, 17:27
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Re: Transpose
Michel Segel 2013-03-05, 15:18
Yes you can.
You read in the row in each iteration of Mapper.map()
Text input.
You then output 3 times to the collector one for each row of the matrix.

Spin,sort, and reduce as needed.

Sent from a remote device. Please excuse any typos...

Mike Segel

On Mar 5, 2013, at 9:11 AM, Mix Nin <[EMAIL PROTECTED]> wrote:

> Hi
>
> I have data in a file as follows . There are 3 columns separated by semicolon(;). Each column would have multiple values separated by comma (,).
>
> 11,22,33;144,244,344;yny;
>
> I need output data in below format. It is like transposing  values of each column.
>
> 11 144 y
> 22 244 n
> 33 344 y
>
> Can we write map reduce program to achieve this. Could you help on the code on how to write.
>
>
> Thanks