How to force axis to have the same range

Sebastien Bihorel <Sebastien.Bihorel <at> cognigencorp.com> writes:

I am trying to produce (standard and trellis) scatterplots which use the 
same range of the x and y axes. In addition, I would like the plots to 
be physically square. Is there one or more specific argument(s) to plot 
and xyplot what would do that? I have looked at various combinations of 
asp and pin value, but could not get what I wanted..

In lattice : aspect = 1

Dieter

Sebastien Bihorel <Sebastien.Bihorel <at> cognigencorp.com> writes:

I am trying to produce (standard and trellis) scatterplots which  
use the
same range of the x and y axes. In addition, I would like the plots  
to
be physically square. Is there one or more specific argument(s) to  
plot
and xyplot what would do that? I have looked at various  
combinations of
asp and pin value, but could not get what I wanted..

In lattice : aspect = 1

To satisfy both of his requests with xyplot, I think he also needs  
xlim and ylim:

  xy <-data.frame(x=1:10, y= rnorm(10)+5)
  xyplot(y ~ x, data=xy, aspect=1)
  xyplot(y ~ x, data=xy, aspect=1, ylim=c(0,11), xlim=c(0,11))

I was less successful in using xlim and ylim with plot, since it seems  
to handle the x-axis differently than the y-axis as far as padding out  
beyond the limits. I would typically need to set asp=0.85 to get what  
looked to ba a square plot. Suggest reading the documentation for  
plot.window() as a start.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

Hi Sebastien, take a look at the par(pty='s') argument. Maybe its can solve
your issue.

Best wishes.

Rodrigo.

-----Mensagem original-----
De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Em
nome de Sebastien Bihorel
Enviada em: segunda-feira, 20 de abril de 2009 12:26
Para: R-help
Assunto: [R] How to force axis to have the same range

Dear R-users,

I am trying to produce (standard and trellis) scatterplots which use the 
same range of the x and y axes. In addition, I would like the plots to 
be physically square. Is there one or more specific argument(s) to plot 
and xyplot what would do that? I have looked at various combinations of 
asp and pin value, but could not get what I wanted..

Thank you in advance for your help

Sebastien

______________________________________________
R-help at r-project.org mailing list
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.

Thanks to all the people who answer my question. It is know clear to 
know how to produce a square shape graph... but I guess there is no easy 
way to force the x and the y axis to have the same limits.

*Sebastien*

Hi Sebastien, take a look at the par(pty='s') argument. Maybe its can solve
your issue.

Best wishes.

Rodrigo.

-----Mensagem original-----
De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Em
nome de Sebastien Bihorel
Enviada em: segunda-feira, 20 de abril de 2009 12:26
Para: R-help
Assunto: [R] How to force axis to have the same range

Dear R-users,

I am trying to produce (standard and trellis) scatterplots which use the 
same range of the x and y axes. In addition, I would like the plots to 
be physically square. Is there one or more specific argument(s) to plot 
and xyplot what would do that? I have looked at various combinations of 
asp and pin value, but could not get what I wanted..

Thank you in advance for your help

Sebastien

______________________________________________
R-help at r-project.org mailing list
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.

Thanks to all the people who answer my question. It is know clear to know
how to produce a square shape graph... but I guess there is no easy way to
force the x and the y axis to have the same limits.

If you mean the general case where you don't want to specify xlim and
ylim explicitly, then in lattice you can use

xyplot(...
       prepanel = function(x, y, ...) {
           rng <- range(x, y, finite = TRUE)
           list(xlim = rng, ylim = rng)
       })

-Deepayan

For variables named my.x and my.y try:

plot( my.x, my.y, xlim=range(my.x,my.y), ylim=range(my.x,my.y) )

If all you want is to have the same range of values on both the x and y axes.

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Sebastien Bihorel
> Sent: Wednesday, April 22, 2009 6:26 AM
> To: Rodrigo Aluizio
> Cc: R Help; 'Sebastien Bihorel'
> Subject: Re: [R] RES: How to force axis to have the same range
> 
> Thanks to all the people who answer my question. It is know clear to
> know how to produce a square shape graph... but I guess there is no
> easy
> way to force the x and the y axis to have the same limits.
> 
> *Sebastien*
> 
> 
> Rodrigo Aluizio wrote:
> > Hi Sebastien, take a look at the par(pty='s') argument. Maybe its can
> solve
> > your issue.
> >
> > Best wishes.
> >
> > Rodrigo.
> >
> > -----Mensagem original-----
> > De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] Em
> > nome de Sebastien Bihorel
> > Enviada em: segunda-feira, 20 de abril de 2009 12:26
> > Para: R-help
> > Assunto: [R] How to force axis to have the same range
> >
> > Dear R-users,
> >
> > I am trying to produce (standard and trellis) scatterplots which use
> the
> > same range of the x and y axes. In addition, I would like the plots
> to
> > be physically square. Is there one or more specific argument(s) to
> plot
> > and xyplot what would do that? I have looked at various combinations
> of
> > asp and pin value, but could not get what I wanted..
> >
> > Thank you in advance for your help
> >
> > Sebastien
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > 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 at r-project.org mailing list
> 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.

Thanks to Greg and Deepayan for their answers.

*Sebastien Bihorel, PharmD, PhD*
PKPD Scientist
Cognigen Corp
Email: sebastien.bihorel at cognigencorp.com 
<mailto:sebastien.bihorel at cognigencorp.com>
Phone: (716) 633-3463 ext. 323

For variables named my.x and my.y try:

  

plot( my.x, my.y, xlim=range(my.x,my.y), ylim=range(my.x,my.y) )
    

If all you want is to have the same range of values on both the x and y axes.