Re: [statistics] Pull request for GLSMultipleLinearRegression

2019-06-07 Thread Alexey Dievsky
Hi Eric, as Elena's mentor, I can try to shed some light on this question. IRLS, as used in GLM fitting, does require a matrix, but it's always diagonal. See, for example, https://bwlewis.github.io/GLM/ , section "Algorithm IRLS". The motivation for this pull request is exactly this -- implement a

Re: [statistics] Pull request for GLSMultipleLinearRegression

2019-05-23 Thread Eric Barnhill
Hi Elena, Thanks for this intriguing idea. As far as I ever knew IRLS requires a matrix. Can you provide me with a citation where I can read about this vector-based approach? Thanks, Eric On Thu, May 23, 2019, 06:44 Елена Картышева wrote: > Hello. > > I would like to propose a pull request im

RE: [statistics] Pull request for GLSMultipleLinearRegression

2019-05-23 Thread Ben Nguyen
component, please post insights here as well: https://issues.apache.org/jira/browse/STATISTICS-8 GitHub Repo: https://github.com/apache/commons-statistics Thank you for your post, Cheers, -Ben Nguyen From: Елена Картышева Sent: Thursday, May 23, 2019 8:44 AM To: dev Subject: [statistics] Pull request for

[statistics] Pull request for GLSMultipleLinearRegression

2019-05-23 Thread Елена Картышева
Hello. I would like to propose a pull request implementing an option to use variance vector instead of covariance matrix. It allows users to avoid unnecessary memory usage and excessive computation in case of uncorrelated but heteroscedastic errors thus making it possible to work with huge inpu

[statistics] Pull request for GLSMultipleLinearRegression

2019-05-23 Thread Ellen Kartysheva
I would like to propose a pull request implementing an option to use variance vector instead of covariance matrix. It allows users to avoid unnecessary memory usage and excessive computation in case of uncorrelated but heteroscedastic errors thus making it possible to work with huge input matrices.