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

Tue, 27 Apr 2010 22:14:35 -0700 

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,
> > > � 
> �  �  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");
> �  � > �  � 
> �  � //Post1 is id> of> a particular row
> > >
> >
> System.out.println(blogpost.get("post:title"));
> � > �  � 
> �  � 
> � > �  �  //
> 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 � 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� 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,> � <aa...@buffa&a
> mp;g> t; lo.edu> wrote:> Hello All,>> >
> >>
> ���
> ��>>>
> ���
> ��� >
> ���
> ��� >>
> ���
> ��� >
> ���
> ��� 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> 
> > 
> > 
> > 
> 
> 
> 
> 
>

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