[R] trellis/lattice: How to plot 4 panels with the same x-scale but different y-scales?

[Marius Hofert]

> I played a bit around and came up with two methods of plotting
> a "matrix of plots" on a single page (see the code below). The first you know
> from my earlier postings. For this method I have the following questions:
> 1) Is it possible to have different x- and y-labels for each of the panels 
> (as in the second plot)?
> 2) Is it possible to rotate the y-axis ticks in each panel by -90 degrees 
> (as in the second plot)?

okay, this one I could figure out: one may add "scales=list(y=list(rot=0))"

> For the second method:
> 3) Is it possible reduce/control the space between the panels?
> 4) Is it possible to align the panels according to their "frame"? [the panels of
> the variables 2 and 4 are not properly aligned as the labels for the latter need
> more space than the ones of the former.]
> 
> Many thanks,
> 
> Marius
> 
> 
> library(lattice)
> library(grid)
> 
> ## panel function
> library(lattice)
> x=c(1,2,1,2,1,2,1,2)
> y=c(1,2,2,1,1,-1,-2000,2000)
> z=c(1,1,2,2,3,3,4,4) # panel number
> xyplot(y~x|z,type="l",aspect=1,layout=c(2,2),
>       scales=list(relation="free",alternating=c(1,1),tck=c(1,0)),
>       par.settings = list(layout.widths = list(axis.panel = 2),
>       layout.heights = list(axis.panel = 2)),
>       panel=function(...){
>               panel.xyplot(...,col=1)
>       }    
> )
> 
> ## grid idea
> myplot <- function(x,y,z,xlab,ylab){
>        xyplot(y~x|z,type="l",aspect=1,
>                xlab=xlab,ylab=ylab,
>                strip = function(...) strip.default(...),
>                scales=list(alternating=c(1,1),tck=c(1,0))
>                )
> }
> grid.newpage()
> pushViewport(viewport(layout=grid.layout(2,2)))
> pushViewport(viewport(layout.pos.row=1,layout.pos.col=1))
>    print(myplot(1:2,1:2,"variable 1","x label","y label"),newpage=FALSE)
> popViewport(1)
> pushViewport(viewport(layout.pos.row=1,layout.pos.col=2))
>  print(myplot(1:2,2:1,"variable 2","x label","y label"),newpage=FALSE)
> popViewport(1)
> pushViewport(viewport(layout.pos.row=2,layout.pos.col=1))
>    print(myplot(1:2,c(1,-1),"variable 3","x label","y label"),newpage=FALSE)
> popViewport(1)
> pushViewport(viewport(layout.pos.row=2,layout.pos.col=2))
>  print(myplot(1:2,c(-2000,2000),"variable 4","x label","y label"),newpage=FALSE)
> popViewport(1)
> 
> 
> 
> On 2010-05-06, at 15:09 , Deepayan Sarkar wrote:
> 
>> On Thu, May 6, 2010 at 6:24 PM, Marius Hofert <m_hofert at web.de> wrote:
>>> Thanks, Deepayan.
>>> 
>>> Is it at least possible to increase the space between the panels in the following plot?:
>>> 
>>> library(lattice)
>>> x=rep(c(1,2,3),4) # x values
>>> y=1:12 # y values
>>> z=rep(1:4,each=3) # panel number
>>> xyplot(y~x|z,type="l",aspect=1,layout=c(2,2),
>>>      scales=list(relation="free",alternating=c(1,1),tck=c(1,0)),
>>>      panel=function(...){
>>>              panel.xyplot(...,col=1)
>>> 
>>>      }
>>> )
>> 
>> Sure, add
>> 
>> par.settings = list(layout.widths = list(axis.panel = 2))
>> 
>> (similarly layout.heights for vertical gap).
>> 
>> -Deepayan
>> 
>>> 
>>> On 2010-05-06, at 13:53 , Deepayan Sarkar wrote:
>>> 
>>>> On Thu, May 6, 2010 at 12:16 PM, Marius Hofert <m_hofert at web.de> wrote:
>>>>> Dear R experts,
>>>>> 
>>>>> I have four plots I would like to plot attached to each other (in panels).
>>>>> All plots have the same x-scale, but different y-scales. The example below shows
>>>>> pretty much what I would like to have, except that for the two plots in the
>>>>> "second column" (of this 2x2 plot-matrix), I would like to have the y-ticks
>>>>> shown on the right side such that the four plot panels are attached to each other/glued
>>>>> together. How can I achieve this?
>>>> 
>>>> There is no easy way.
>>>> 
>>>> For the first step of a difficult way, see ?axis.default
>>>> 
>>>> -Deepayan
>>>> 
>>>> 
>>>>> I found a solution for a 2x1 matrix in the R-help archive, but this problem here is different.
>>>>> 
>>>>> Cheers,
>>>>> 
>>>>> Marius
>>>>> 
>>>>> Ps: I guess the "scales=..." should somehow go inside the panel function, so that
>>>>> the panel number tells the "alternating"-argument where it has to print the ticks.
>>>>> 
>>>>> library(lattice)
>>>>> x=rep(c(1,2,3),4) # x values
>>>>> y=1:12 # y values
>>>>> z=rep(1:4,each=3) # panel number
>>>>> xyplot(y~x|z,type="l",aspect=1,layout=c(2,2),
>>>>>       scales=list(y=list(relation="free"),alternating=c(1,1),tck=c(1,0)),
>>>>>       panel=function(...){
>>>>>               panel.xyplot(...,col=1)
>>>>> 
>>>>>       }
>>>>> )
>>>>> ______________________________________________
>>>>> 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.
>>>>> 
>>> 
>>> 
>