R help - Jun 2017 - Piecewise continuous logistic regression with one knot

How can I fit a piecewise continuous logistic regression with a single free knot
(i.e. the knot is not specified; the model produce an estimate of the value of
the knot).


Thank you,

John




John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and Geriatric
Medicine
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)


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A quick web search on "piecewise regression R" immediately brought up
(the fairly well known) package "segmented" which fits segmented
glm's.


-- Bert


Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Jun 23, 2017 at 4:06 AM, Sorkin, John <jsorkin at
som.umaryland.edu> wrote:
> How can I fit a piecewise continuous logistic regression with a single free
knot (i.e. the knot is not specified; the model produce an estimate of the value
of the knot).
>
>
> Thank you,
>
> John
>
>
>
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>
>         [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.