Re: [R] possible issue with scatterplot function in car package
Great, thanks for the update!
Yousri
On Sun, May 3, 2020 at 10:54 PM Fox, John wrote:
> Dear Yousri,
>
> The problem with scatterplot() is now fixed in the development version
> 3.0-8 of the car package on R-Forge, which eventually will be submitted to
> CRAN. Until then, you can install the package via install.packages("car",
> repos="http://R-Forge.R-project.org;)
>
> Thanks again for the bug report,
> John
>
> > On May 3, 2020, at 4:37 AM, Yousri Fanous
> wrote:
> >
> > Thank you Professor John for your answer.
> >
> > As you rightly said I am not using the ch in my example report as it has
> no bearing to the issue.
> > However it is the ch that led me to find the issue.
> > I was trying to label each point with its corresponding aa$ch value.
> > I used this code:
> >
> > scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> FALSE,regLine=F)
> > text(aa$x,aa$y, labels=aa$ch,font=1 ,cex=.9,pos=3)
> >
> > The annotation was correct for 4 points but not for the (2,5) point.
> > I figured it is because it is close to the margin of the plot hence as a
> quick solution I modified xlim to shift the point away from the margin.
> > This worked for the annotation but eventually led to the issue I
> described.
> >
> > Thank you so much for your time
> >
> > Yousri Fanous
> >
> > Software Developer
> > IBM CANADA
> >
> > On Sat, May 2, 2020 at 11:47 PM Fox, John wrote:
> >
> > Dear Yousri,
> >
> > Yes, this is clearly a bug, and almost surely a long-standing one. We'll
> fix it in the next release of the car package.
> >
> > BTW, stringsAsFactors defaults to FALSE in R 4.0.0 (and you don't use
> the ch variable in the example). Also, although it has no bearing on the
> bug, I'd generally prefer
> >
> > scatterplot(y ~ x, data=aa, smooth=FALSE, grid=FALSE,
> > frame=FALSE, regLine=FALSE, xlim=c(0, 8))
> >
> > Thank you for the bug report,
> > John
> >
> > -
> > John Fox, Professor Emeritus
> > McMaster University
> > Hamilton, Ontario, Canada
> > Web: http::/socserv.mcmaster.ca/jfox
> >
> > > On May 2, 2020, at 7:30 PM, Yousri Fanous
> wrote:
> > >
> > > library (car)
> > >
> > > aa <- data.frame(x=c(2, 5, 6, 7, 8),
> > > + y=c(5, 10, 9, 12, 11),
> > > + ch=c("N", "Q", "R", "S", "T"),
> > > + stringsAsFactors=FALSE)
> > >
> > > scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> FALSE,regLine=F)
> > >
> > > Both x and y boxplots are correct
> > > and in particular the median of the x box is at 6 which is confirmed
> > >
> > >> median(aa$x)
> > > [1] 6
> > >
> > > Now I do only one addition to the scatterplot: I add xlim
> > >> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> > > FALSE,regLine=F,xlim=c(0,8))
> > >
> > > This causes the boxplot on x-axis to be in error:
> > > 1) the lower whisker starts now from zero
> > > 2) the median is between 4 and 6 and no longer at 6 as before
> > >
> > >> sessionInfo()
> > > R version 3.6.3 (2020-02-29)
> > > [1] car_3.0-7
> > >
> > > [[alternative HTML version deleted]]
> > >
> > > __
> > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > > https://stat.ethz.ch/mailman/listinfo/r-help
> > > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] possible issue with scatterplot function in car package
Dear Yousri,
The problem with scatterplot() is now fixed in the development version 3.0-8 of
the car package on R-Forge, which eventually will be submitted to CRAN. Until
then, you can install the package via install.packages("car",
repos="http://R-Forge.R-project.org;)
Thanks again for the bug report,
John
> On May 3, 2020, at 4:37 AM, Yousri Fanous wrote:
>
> Thank you Professor John for your answer.
>
> As you rightly said I am not using the ch in my example report as it has no
> bearing to the issue.
> However it is the ch that led me to find the issue.
> I was trying to label each point with its corresponding aa$ch value.
> I used this code:
>
> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame = FALSE,regLine=F)
> text(aa$x,aa$y, labels=aa$ch,font=1 ,cex=.9,pos=3)
>
> The annotation was correct for 4 points but not for the (2,5) point.
> I figured it is because it is close to the margin of the plot hence as a
> quick solution I modified xlim to shift the point away from the margin.
> This worked for the annotation but eventually led to the issue I described.
>
> Thank you so much for your time
>
> Yousri Fanous
>
> Software Developer
> IBM CANADA
>
> On Sat, May 2, 2020 at 11:47 PM Fox, John wrote:
>
> Dear Yousri,
>
> Yes, this is clearly a bug, and almost surely a long-standing one. We'll fix
> it in the next release of the car package.
>
> BTW, stringsAsFactors defaults to FALSE in R 4.0.0 (and you don't use the ch
> variable in the example). Also, although it has no bearing on the bug, I'd
> generally prefer
>
> scatterplot(y ~ x, data=aa, smooth=FALSE, grid=FALSE,
> frame=FALSE, regLine=FALSE, xlim=c(0, 8))
>
> Thank you for the bug report,
> John
>
> -
> John Fox, Professor Emeritus
> McMaster University
> Hamilton, Ontario, Canada
> Web: http::/socserv.mcmaster.ca/jfox
>
> > On May 2, 2020, at 7:30 PM, Yousri Fanous wrote:
> >
> > library (car)
> >
> > aa <- data.frame(x=c(2, 5, 6, 7, 8),
> > + y=c(5, 10, 9, 12, 11),
> > + ch=c("N", "Q", "R", "S", "T"),
> > + stringsAsFactors=FALSE)
> >
> > scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame = FALSE,regLine=F)
> >
> > Both x and y boxplots are correct
> > and in particular the median of the x box is at 6 which is confirmed
> >
> >> median(aa$x)
> > [1] 6
> >
> > Now I do only one addition to the scatterplot: I add xlim
> >> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> > FALSE,regLine=F,xlim=c(0,8))
> >
> > This causes the boxplot on x-axis to be in error:
> > 1) the lower whisker starts now from zero
> > 2) the median is between 4 and 6 and no longer at 6 as before
> >
> >> sessionInfo()
> > R version 3.6.3 (2020-02-29)
> > [1] car_3.0-7
> >
> > [[alternative HTML version deleted]]
> >
> > __
> > R-help@r-project.org 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.
>
__
R-help@r-project.org 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.
Re: [R] possible issue with scatterplot function in car package
Thank you Professor John for your answer.
As you rightly said I am not using the ch in my example report as it has no
bearing to the issue.
However it is the ch that led me to find the issue.
I was trying to label each point with its corresponding aa$ch value.
I used this code:
scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame = FALSE,regLine=F)
text(aa$x,aa$y, labels=aa$ch,font=1 ,cex=.9,pos=3)
The annotation was correct for 4 points but not for the (2,5) point.
I figured it is because it is close to the margin of the plot hence as a
quick solution I modified xlim to shift the point away from the margin.
This worked for the annotation but eventually led to the issue I described.
Thank you so much for your time
Yousri Fanous
Software Developer
IBM CANADA
On Sat, May 2, 2020 at 11:47 PM Fox, John wrote:
>
> Dear Yousri,
>
> Yes, this is clearly a bug, and almost surely a long-standing one. We'll
> fix it in the next release of the car package.
>
> BTW, stringsAsFactors defaults to FALSE in R 4.0.0 (and you don't use the
> ch variable in the example). Also, although it has no bearing on the bug,
> I'd generally prefer
>
> scatterplot(y ~ x, data=aa, smooth=FALSE, grid=FALSE,
> frame=FALSE, regLine=FALSE, xlim=c(0, 8))
>
> Thank you for the bug report,
> John
>
> -
> John Fox, Professor Emeritus
> McMaster University
> Hamilton, Ontario, Canada
> Web: http::/socserv.mcmaster.ca/jfox
>
> > On May 2, 2020, at 7:30 PM, Yousri Fanous
> wrote:
> >
> > library (car)
> >
> > aa <- data.frame(x=c(2, 5, 6, 7, 8),
> > + y=c(5, 10, 9, 12, 11),
> > + ch=c("N", "Q", "R", "S", "T"),
> > + stringsAsFactors=FALSE)
> >
> > scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> FALSE,regLine=F)
> >
> > Both x and y boxplots are correct
> > and in particular the median of the x box is at 6 which is confirmed
> >
> >> median(aa$x)
> > [1] 6
> >
> > Now I do only one addition to the scatterplot: I add xlim
> >> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> > FALSE,regLine=F,xlim=c(0,8))
> >
> > This causes the boxplot on x-axis to be in error:
> > 1) the lower whisker starts now from zero
> > 2) the median is between 4 and 6 and no longer at 6 as before
> >
> >> sessionInfo()
> > R version 3.6.3 (2020-02-29)
> > [1] car_3.0-7
> >
> > [[alternative HTML version deleted]]
> >
> > __
> > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
>
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] possible issue with scatterplot function in car package
Dear Yousri,
Yes, this is clearly a bug, and almost surely a long-standing one. We'll fix it
in the next release of the car package.
BTW, stringsAsFactors defaults to FALSE in R 4.0.0 (and you don't use the ch
variable in the example). Also, although it has no bearing on the bug, I'd
generally prefer
scatterplot(y ~ x, data=aa, smooth=FALSE, grid=FALSE,
frame=FALSE, regLine=FALSE, xlim=c(0, 8))
Thank you for the bug report,
John
-
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: http::/socserv.mcmaster.ca/jfox
> On May 2, 2020, at 7:30 PM, Yousri Fanous wrote:
>
> library (car)
>
> aa <- data.frame(x=c(2, 5, 6, 7, 8),
> + y=c(5, 10, 9, 12, 11),
> + ch=c("N", "Q", "R", "S", "T"),
> + stringsAsFactors=FALSE)
>
> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame = FALSE,regLine=F)
>
> Both x and y boxplots are correct
> and in particular the median of the x box is at 6 which is confirmed
>
>> median(aa$x)
> [1] 6
>
> Now I do only one addition to the scatterplot: I add xlim
>> scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame =
> FALSE,regLine=F,xlim=c(0,8))
>
> This causes the boxplot on x-axis to be in error:
> 1) the lower whisker starts now from zero
> 2) the median is between 4 and 6 and no longer at 6 as before
>
>> sessionInfo()
> R version 3.6.3 (2020-02-29)
> [1] car_3.0-7
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org 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.
__
R-help@r-project.org 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.
