Re: Re: Re: Re: Re: Doubt in the EigenValueProcedure in DenseMatrix.java

Edward J. Yoon Wed, 28 Apr 2010 00:19:12 -0700

Try as below:

HTable table = new HTable(conf, matrixPath);
Get get;


  for (int i = 0; i < e.length; i++) {
      get = new Get(BytesUtil.getRowIndex(i));
      e1 = Bytes.toDouble(table.get(get).getValue(Bytes.toBytes(Constants.EI),
Bytes.toBytes(Constants.EIVAL)));

      for (int j = 0; j < E[i].length; j++) {
        get = new Get(BytesUtil.getRowIndex(i));
        ev = 
Bytes.toDouble(table.get(get).getValue(Bytes.toBytes(Constants.EIVEC),
Bytes.toBytes(String.valueOf(j))));
      }
    }
  }

On Wed, Apr 28, 2010 at 2:11 PM,  <[email protected]> wrote:
> Hey,
>    Quick question. Here is the code that I have written to print the eigen 
> vector
>
> DenseVector vect= table.get(BytesUtil.getRowIndex(i),Bytes.toBytes("eivec:"));
> for(int j=0;j<10;j++)
>    System.out.printf("%f ",vect.get(j));
>
> Something is wrong but I am not quite sure what the error is. Also how are the
> eigen vectors stored. I mean is it a single column which returns a vector or 
> is
> it a column family ? If they are stored as a column family then what are the
> names of the individual columns ?
>
> Best Regards from Buffalo
>
> Abhishek Agrawal
>
> SUNY- Buffalo
> (716-435-7122)
>
> On Wed 04/28/10 12:11 AM , [email protected] sent:
>> Hey man,
>> Thanks a lot .... I got that part working with a couple of
>> modifications. Next step is to print all the eigen vectors. Lets see how
>> that goes
>> Best Regards from Buffalo
>>
>> Abhishek Agrawal
>>
>> SUNY- Buffalo
>> (716-435-7122)
>>
>> On Mon 04/26/10 10:52 PM , "Edward J. Yoon" edwardy
>> [email protected] sent:> Here's code for you.
>> >
>> > HTable table = new HTable(conf,
>> matrixPath);> Get get = new Get(rowKey);
>> >
>> table.get(get).getValue(Bytes.toBytes("eval"),> Bytes.toBytes("value"));
>> > See also, DenseMatrix.verifyEigenValue()
>> method.>
>> > Thanks,
>> > Edward.
>> >
>> > On Tue, Apr 27, 2010 at 11:13 AM,  <aa...@buffa> lo.edu> wrote:> Hi all,
>> > > Ã�Â
>> Ã�Â  Ã�Â  For> the last 3-4 days I have been working on the
>> Jacobi Eigen Value> method. In thecontext of that method I have
>> > some doubts so as to how the does>
>> DenseMatrix use the HTable to store data. Here> is what my problem is.>
>> > > From the documentation I see that the
>> Jacobi> EigenValue method stores the> eigenvalues in
>> another column of the original> matrix. Tor retrieve these values I> want to
>> use some code of this sort> >
>> > > public static void main(String[] args)
>> throws> IOException {> Map blogpost =
>> > HBaseConnector.retrievePost("post1");
>> Ã�Â  Ã�Â > Ã�Â  Ã�Â
>> Ã�Â  Ã�Â //Post1 is id> of> a particular row
>> > >
>> >
>> System.out.println(blogpost.get("post:title"));
>> Ã�Â > Ã�Â  Ã�Â
>> Ã�Â  Ã�Â
>> Ã�Â > Ã�Â  Ã�Â  //
>> Post:title is> the column family> >
>> >
>> System.out.println(blogpost.get("post:author"));> }> >
>> > > But I am unable to understand what values
>> to use> for the row- ids so that I can> retrieve the
>> Eigen Values. Or is there any other> method to retrieve these values ?>
>> > >
>> > > Best Regards from Buffalo
>> > >
>> > > Abhishek Agrawal
>> > >
>> > > SUNY- Buffalo
>> > > (716-435-7122)
>> > >
>> > > On Fri 04/23/10 Ã�Â 6:00
>> PM , aa...@buffa> lo.edu sent:>> Hi Edward,
>> > >> I have a couple of more questions about
>> the> Jacobi Eigen Value>> procedure. As of now
>> I think all the eigen> values are stored in the>>
>> eival:valuecolumn in the JacobiEigenValue> table. So to return the eigen
> values> all
>> I> >> have todo is at the end of the
>> function, I> have to write return
>> JacobiEigenValue;>>> >> I tried this and it did not compile.
>> What is> the mistake ?>>
>> > >>
>> > >> Best Regards from Buffalo
>> > >>
>> > >> Abhishek Agrawal
>> > >>
>> > >> SUNY- Buffalo
>> > >> (716-435-7122)
>> > >>
>> > >> On Mon 03/15/10
>> Ã�Â 2:08 AM ,> "Edward J. Yoon" edwardy>> [email protected]
>> >  sent:> Hi,>> >
>> > >> > > Currently what I am doing
>> is> generating a>> 10*10> random matrix and
>> I give 3 as> the>> > Jacobi Eigenvalue Algorithm is
>> only> works for>> symmetric
>> matrix.>> >> > > number of loops. I dont
>> understand> why but>> my> output looks very much
>> like my>> input. If I>> increase the number of loops
>> what> should> I increase it to ?Is there> any co>>
>> relation between size of the matrix and>> the number of loops>> > See the 814
>> line code of DenseMatrix> "while>> (state != 0 &&>
>> icount <> imax)">> > The integer state
>> counts the number> of>> components of changed which> have
>> the> value true. Iteration stops as soon as>>
>> state = 0.>> >> > The integer imax counts is just
>> a> optional. In>> TestJacobiEigenValue>
>> class, imax is> '100', but will be stoped when>> state = 0
>> (49> iterations).> >> >
>> > >> > On Sun, Mar 14, 2010 at 1:06
>> PM,> Ã�Â <aa...@buffa&a
>> mp;g> t; lo.edu> wrote:> Hello All,>> >
>> >>
>> Ã�ï¿½Ã¯Â¿Â½
>> Ã�ï¿½>>>
>> Ã�ï¿½Ã¯Â¿Â½
>> Ã�ï¿½Ã�Â >
>> Ã�ï¿½Ã¯Â¿Â½
>> Ã�ï¿½Ã�Â >>
>> Ã�ï¿½Ã¯Â¿Â½
>> Ã�ï¿½Ã�Â >
>> Ã�ï¿½Ã¯Â¿Â½
>> Ã�ï¿½Ã�Â I>> solved the
>> previous problem. Now my program> is> able to get the eigen> values,> but
>> I want to> >> know what is a good value> to give
>> for> the number of loops.> Currently>> what
>> I am doing is generating a 10*10>> random matrix and I give 3 as the> number
>> of>> loops. I dont understand why but my>> output looks very much like my>
> input. If
>> I>> increase the number of loopswhat> should
>> > I increase it to ?Is there> any co>>
>> relation between size of the matrix and>> the number of loops>>> > > Best
>> Regards from> Buffalo>> > >
>> > >> > > Abhishek Agrawal
>> > >> > >
>> > >> > > SUNY- Buffalo
>> > >> > > (716-435-7122)
>> > >> > >
>> > >> > > On Sat 03/13/10 12:33 AM , aa...@buffa&a
>> mp;g> t; lo.edu sent:>> Hi,>> >
>> >> I was looking through> the>> Eigenvalue> procedure in
>> DenseMatrix.java> and I>>>> seethe values of the
>> calculated eigen> values> are stored in a table. I
>> was>>>> wonderinghow ca I access the values of> this> table from my 
>> application.>
>> According to>>> >> myunderstanding the name of the
>> tableis> not>> > given at run
>> time>>> >> > >> Best Regards
>> from> Buffalo>> > >>
>> > >> > >> Abhishek
>> Agrawal> >> > >>
>> > >> > >> SUNY- Buffalo
>> > >> > >> (716-435-7122)
>> > >> > >>
>> > >> > >> On Fri 03/12/10 11:21 PM
>> , aa...@buffa&a
>> mp;a> mp;g>> t;> lo.edu sent:> Hi,>
>> >>> > I am a relatively new user of>> Hama.
>> I> ran the>> command> "bin/hama>>> examples>
>> "and this is the output I> am>>>> getting >> >>
>> > had...@zeus:~
>> > >> > >> > /HAMA$
>> > bin/hama>> examplesRunJar>
>> jarFile>>> [mainClass] args...> had...@zeus:~
>> > >> > >> > /HAMA$
>> > >> > >> > From the wiki I see
>> that> this is>> not> what I>> should be
>> getting.> What is>> the> reasonfor> this
>> ?>>> >>> > >> > Best
>> Regards> from>> Buffalo> >>
>> >> >> > >> > Abhishek
>> > Agrawal>> > >> >
>> > >> > >> > SUNY-
>> Buffalo> >> > >> >
>> (716-435-7122)> >> > >> >
>> > >> > >> >
>> > >> > >> >
>> > >> > >> >
>> > >> > >> >
>> > >> > >>
>> > >> > >>
>> > >> > >>
>> > >> > >>
>> > >> > >>
>> > >> > >
>> > >> > >
>> > >> >
>> > >> >
>> > >> >
>> > >> > --
>> > >> > Best Regards, Edward J. Yoon
>> @> NHN,>> corp.> edwardy
>> > >> > [email protected]http://blog.udanax.org>>>
>> >> >> >
>> > >> >
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >
>> > >
>> >
>> >
>> >
>> > --
>> > Best Regards, Edward J. Yoon
>> > edwardy
>> > [email protected]http://blog.udanax.org>
>> >
>> >
>> >
>>
>>
>>
>>
>>
>
>



-- 
Best Regards, Edward J. Yoon
[email protected]
http://blog.udanax.org

Re: Re: Re: Re: Re: Doubt in the EigenValueProcedure in DenseMatrix.java

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