bugGNU Octave - Bugs: bug #52417, [octave forge] (statistics) size...


bug #52417: [octave forge] (statistics) size not match in logistic_regression docstring

Submitted by:  None
Submitted on:  Thu 16 Nov 2017 06:58:20 AM UTC  
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Documentation
Status:  Need Info Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  Open Release:  dev
Operating System:  Any

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Wed 22 Nov 2017 07:01:11 PM UTC, comment #1:

I don't know enough about the logitistic regression to be able to tell which version of the equation is correct. Unfortunately, we need someone with either statistics expertise, or who can read the m-file, to determine the correct phrasing.

Rik <rik5>
Project Administrator
Thu 16 Nov 2017 06:58:20 AM UTC, original submission:

In the docstring of "logistic_regression.m", it seems that

should be

Because of unmatched matrix sizes,
would raise the error "nonconformant arguments", while
would not.

The parameters X and BETA of "logistic_regression.m" have the same convention as "ols.m" (linear regression), where rows(X) equals the number of training samples, and rows(BETA)==columns(X) equals the number of input features.

The docstring of "ols.m" says
which is correct (where BETA is just the estimator for b).

But I'm not familiar with logistic regression in the case of K > 2, so I'm not very sure whether this change is correct.



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  • -email is unavailable- added by mtmiller (Updated the item)
  • -email is unavailable- added by rik5 (Posted a comment)
  • -email is unavailable- added by None (Submitted the item)

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-06-19 mtmiller CategoryDocumentation => Octave Forge Package
        Release4.2.1 => dev
        Summarysize not match in logistic_regression docstring => [octave forge] (statistics) size not match in logistic_regression docstring
    2017-11-22 rik5 StatusNone => Need Info

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