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In python numpy least squares, why a singular normal matrix does NOT raise LinAlgError?

score 395 · Answer 1 · 2014-11-27T09:27:40.937000

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In python numpy least squares, why a singular normal matrix does NOT raise LinAlgError?

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score 266 · Answer 12 · 2021-06-01T20:25:15.157000

despite singular.ok = FALSE, lm() reports a result while solve(t(X) %% X) %% (t(X) %*% y) reports (correctly) an error

266 views Asked by Grillo At 01 June 2021 at 20:25

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score 1202 · Answer 15 · 2022-03-22T01:46:42.140000

fixed-effect model matrix is rank deficient so dropping 27 columns / coefficients AND boundary (singular)

1.2k views Asked by cpc At 22 March 2022 at 01:46

score 5804 · Answer 16 · 2014-05-24T17:45:13.937000

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score 694 · Answer 19 · 2017-11-29T19:12:15.833000

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TechQA.

List Question

In python numpy least squares, why a singular normal matrix does NOT raise LinAlgError?

numpy.linalg.inv returns inverse for a singular matrix

How can I implement "natural" url scheme routing tables in ASP.NET MVC

Plural and Singular terms in PHP

Need help plotting this function in Matlab

What causes "Jacobian matrix" to be singular in SAS?

Linear regression with near singular matrix inversion

Boundary (singular) fit in lmer

Test if a word is singular or plural in Ruby on Rails

Singular or Plural setting to a variable. PHP

How to apply the colamd algorithm on a sparse matrix in python?

despite singular.ok = FALSE, lm() reports a result while solve(t(X) %% X) %% (t(X) %*% y) reports (correctly) an error

Java - Matrix is singular

OpenModelica trivial mechanical system structurally singular

fixed-effect model matrix is rank deficient so dropping 27 columns / coefficients AND boundary (singular)

Detecting mulicollinear , or columns that have linear combinations while modelling in Python : LinAlgError

Confused by AngularJS ng-repeat syntax

Search for plural words in line and make it singular words

Synthetic control method: placebo test error: system is computationally singular

how to use lombok singular different

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