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, <[email protected]> wrote:
> Hi all,
> For the last 3-4 days I have been working on the Jacobi Eigen Value
> method. In the context 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 , [email protected] 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 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> lo.edu> wrote:> Hello All,
>> > > Ã�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 loops what> 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> 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&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
[email protected]
http://blog.udanax.org
