Re: [Rd] Concerns with SVD -- and the Matrix Exponential

hool of Medicine Department of Biomedical Informatics ah...@pitt.edu (724) 612-9940 -- *From:* R-devel on behalf of Durga Prasad G me14d059 *Sent:* Tuesday, August 1, 2023 4:18:20 AM *To:* Martin Maechler ; r-devel@r-project.org ; profjcn...@gmail.com *Subject:* Re

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

> Doctoral Fellow, Wright Lab <https://www.wrightlabscience.com/> > > > > University of Pittsburgh School of Medicine > > > > Department of Biomedical Informatics > > > > ah...@pitt.edu > > > > (724) 612-9940 > > > > > > > > -

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

tin Maechler , r-devel@r-project.org , profjcn...@gmail.com Subject: Re: [Rd] Concerns with SVD -- and the Matrix Exponential >>>>> Durga Prasad G me14d059 >>>>> on Wed, 16 Aug 2023 13:36:10 +0530 writes: > Dear Martin, I am getting different responses from d

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

day, August 1, 2023 4:18:20 AM > *To:* Martin Maechler ; r-devel@r-project.org > ; profjcn...@gmail.com > *Subject:* Re: [Rd] Concerns with SVD -- and the Matrix Exponential > > Hi Martin, Thank you for your reply. The response and the links provided by > you helped to learn more

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

(724) 612-9940 >> >> >> >> -- >> *From:* R-devel on behalf of Durga Prasad >> G me14d059 >> *Sent:* Tuesday, August 1, 2023 4:18:20 AM >> *To:* Martin Maechler ; r-devel@r-project.org >&g

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

of Durga Prasad G me14d059 Sent: Tuesday, August 1, 2023 4:18:20 AM To: Martin Maechler ; r-devel@r-project.org ; profjcn...@gmail.com Subject: Re: [Rd] Concerns with SVD -- and the Matrix Exponential Hi Martin, Thank you for your reply. The response and the links provided by you helped to learn more.

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

Hi Martin, Thank you for your reply. The response and the links provided by you helped to learn more. But I am not able to obtain the simple even powers of a matrix: one simple case is the square of a matrix. The square of the matrix using direct matrix multiplication operations and svd (A = U D V'

Re: [Rd] Concerns with SVD -- and the Matrix Exponential

> J C Nash > on Sun, 16 Jul 2023 13:30:57 -0400 writes: > Better check your definitions of SVD -- there are several > forms, but all I am aware of (and I wrote a couple of the > codes in the early 1970s for the SVD) have positive > singular values. > JN Indeed.

Re: [Rd] Concerns with SVD

Better check your definitions of SVD -- there are several forms, but all I am aware of (and I wrote a couple of the codes in the early 1970s for the SVD) have positive singular values. JN On 2023-07-16 02:01, Durga Prasad G me14d059 wrote: Respected Development Team, This is Durga Prasad reac