I think... If we construct the small matrix, we maybe don't need to use the hbase before the store it.
On Wed, May 20, 2009 at 11:16 PM, Edward J. Yoon <[email protected]> wrote: > //make matrix of stacked flattened images > Matrix matrix = new Matrix(dpix); > > Hmm, Should we add this constructor for Image? IMO, it can be added to > DenseMatrix, but it could be really small. > > AFAIK, In commons.math2, linear algebra will be added. It would be > nice if we use it as a local version. > > Any comments are welcome. > > On Wed, May 20, 2009 at 10:53 PM, Edward J. Yoon <[email protected]> > wrote: >> Hi, >> >>> I am not sure this code easily can be parallel computed,or how to change >>> this code to add the parallel compuation.any advice will be >>> appreciated.thanks in advance. >> >> OK, I'm sure it could be run on Hama/Hadoop. >> >> According to my understanding of your code, It's a PCA. If you have an >> M images as represented N^2 * 1 vectors, vector will be nomalized by >> step-2. In step-3, the covariance matrix will be constructed using >> matrix A by deviation of images and A^T. Finally you'll get the >> eigenfaces using eigen values/vectors. >> >> There are two large computing component in the step-3 and step-4, such >> as N^2 by N^2 matrix transpose, multiplication and eigen >> values/vectors of M by M matrix. >> >> Currently in Hama, multiplication and transpose were implemented. If >> eigenvalue decomposition is implement, you can easily migrate code. >> >>> hama has it's own mailing list and this question is probably better >>> asked there. see http://incubator.apache.org/hama/mailing_lists.html >> >> Yes, we have own mailing list. Please contact us. >> >> Thanks, >> Edward >> >> On Wed, May 20, 2009 at 4:51 PM, Robert Burrell Donkin >> <[email protected]> wrote: >>> On Wed, May 20, 2009 at 8:08 AM, ykj <[email protected]> wrote: >>>> >>>> Hello,everyone >>> >>> hi >>> >>>> I am new to hama. in our project ,my team leader let me upload old >>>> code, run it on hadoop with parallel matrix computation. >>> >>> hama has it's own mailing list and this question is probably better >>> asked there. see http://incubator.apache.org/hama/mailing_lists.html >>> >>> thanks >>> >>> - robert >>> >> >> >> >> -- >> Best Regards, Edward J. Yoon @ NHN, corp. >> [email protected] >> http://blog.udanax.org >> > > > > -- > Best Regards, Edward J. Yoon @ NHN, corp. > [email protected] > http://blog.udanax.org > -- Best Regards, Edward J. Yoon @ NHN, corp. [email protected] http://blog.udanax.org MO,
