We need discriminant function and inverse operation. See http://en.wikipedia.org/wiki/Invertible_matrix (especially, Analytic solution and Blockwise inversion Part)
- Edward On 7/24/08, Vaijanath N. Rao <[EMAIL PROTECTED]> wrote: > Hi Edward and Chanwit, > > What all should I need to know for getting the inverse in Hama. I can start > looking at it and implementing it for Hama. > > --Thanks and Regards > Vaijanath > > > Chanwit Kaewkasi wrote: > > Would we raise an inverse operation issue in JIRA? > > > > Cheers, > > > > Chanwit > > > > 2008/7/23 Edward J. Yoon <[EMAIL PROTECTED]>: > > > > > > > > > > > Actually, in my work, I'll use Newton's method which involves many > > > > matrix multiplication and subtraction. It seems that you have finished > > > > this part. > > > > > > > > > > > Yes, It done. > > > > > > > > > > > > > BTW, although I plan to use Quasi-Newton method to avoid calculate the > > > > inverse of Hessian directly, I'm wonder do you plan to implement the > > > > inverse operation? > > > > > > > > > > > Of course, We also have a lot of needs and issues regarding inverse > operation. > > > > > > Regards, Edward J. Yoon > > > > > > On Wed, Jul 23, 2008 at 11:02 PM, Yun Jiang <[EMAIL PROTECTED]> wrote: > > > > > > > > > > Hi, > > > > That's great, since this can reduce much of my work:) > > > > Actually, in my work, I'll use Newton's method which involves many > > > > matrix multiplication and subtraction. It seems that you have finished > > > > this part. > > > > > > > > BTW, although I plan to use Quasi-Newton method to avoid calculate the > > > > inverse of Hessian directly, I'm wonder do you plan to implement the > > > > inverse operation? > > > > > > > > Best, > > > > > > > > On Wed, Jul 23, 2008 at 9:28 PM, Chanwit Kaewkasi <[EMAIL PROTECTED]> > wrote: > > > > > > > > > > > > > Hello Yun, > > > > > > > > > > Glad to see another gsoc-er around :-) > > > > > I'm doing gsoc for another project (Groovy) while helping Edward > > > > > incubate this one. > > > > > > > > > > Cheers, > > > > > > > > > > Chanwit > > > > > > > > > > 2008/7/23 Yun Jiang <[EMAIL PROTECTED]>: > > > > > > > > > > > > > > > > Hi, all > > > > > > I'm implementing Logistic Regression in project of mahout in gsoc. > > > > > > Is that ok if I use hama in my project? > > > > > > > > > > > > Thanks, > > > > > > Yun > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > Best regards, Edward J. Yoon > > > [EMAIL PROTECTED] > > > http://blog.udanax.org > > > > > > > > > > > > > > > > > -- Best regards, Edward J. Yoon [EMAIL PROTECTED] http://blog.udanax.org
