quantile regression: warning message

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quantile regression: warning message

T.Riedle
Greetings R Community,
I am trying to run a quantile regression using the quantreg package. My code looks as follows:
RegressionUtilitiesUK<-rq(ReturnUtilities~yield.spread.change+ReturnFTSE, tau=0.01,data=State_variables_UK_calm)

Unfortunately, the summary() function returns the results but also following warning message:
Warning message:
In rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique

My question now is if I should worry about the results. Are my results correct and how can I avoid this message? I do not understand the message.

Thanks a lot for your feedback.

        [[alternative HTML version deleted]]

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Re: quantile regression: warning message

Roger Koenker-3
see the output from the quantreg FAQ:

        FAQ()

especially point 2.


url:    www.econ.uiuc.edu/~roger            Roger Koenker
email    [hidden email]            Department of Economics
vox:     217-333-4558                University of Illinois
fax:       217-244-6678                Urbana, IL 61801

> On Oct 13, 2015, at 2:55 PM, T.Riedle <[hidden email]> wrote:
>
> Greetings R Community,
> I am trying to run a quantile regression using the quantreg package. My code looks as follows:
> RegressionUtilitiesUK<-rq(ReturnUtilities~yield.spread.change+ReturnFTSE, tau=0.01,data=State_variables_UK_calm)
>
> Unfortunately, the summary() function returns the results but also following warning message:
> Warning message:
> In rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
>
> My question now is if I should worry about the results. Are my results correct and how can I avoid this message? I do not understand the message.
>
> Thanks a lot for your feedback.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> [hidden email] mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

______________________________________________
[hidden email] mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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Re: quantile regression: warning message

T.Riedle
Thank you very much.
So, the results are correct and the differences between the solutions are pretty small. Thus, I do not need to worry about the warning message? Yes?



-----Original Message-----
From: Roger Koenker [mailto:[hidden email]]
Sent: 13 October 2015 21:59
To: T.Riedle
Cc: [hidden email]
Subject: Re: [R] quantile regression: warning message

see the output from the quantreg FAQ:

        FAQ()

especially point 2.


url:    www.econ.uiuc.edu/~roger            Roger Koenker
email    [hidden email]            Department of Economics
vox:     217-333-4558                University of Illinois
fax:       217-244-6678                Urbana, IL 61801

> On Oct 13, 2015, at 2:55 PM, T.Riedle <[hidden email]> wrote:
>
> Greetings R Community,
> I am trying to run a quantile regression using the quantreg package. My code looks as follows:
> RegressionUtilitiesUK<-rq(ReturnUtilities~yield.spread.change+ReturnFT
> SE, tau=0.01,data=State_variables_UK_calm)
>
> Unfortunately, the summary() function returns the results but also following warning message:
> Warning message:
> In rq.fit.br(x, y, tau = tau, ...) : Solution may be nonunique
>
> My question now is if I should worry about the results. Are my results correct and how can I avoid this message? I do not understand the message.
>
> Thanks a lot for your feedback.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> [hidden email] mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

______________________________________________
[hidden email] mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.