[R] setting yaxis in logscale

[Duncan Mackay]

I have not received my OP email yet or the gremlins of filters have stepped
in

I had a quick look at the site but did not find anything

It is a case of modifying the scales argument

dput(xy)
structure(list(x = c(1L, 2L, 3L, 4L, 5L, 1L, 2L, 3L, 4L, 5L, 
1L, 2L, 3L, 4L, 5L), y = c(1L, 2L, 3L, 4L, 5L, 1L, 2L, 3L, 4L, 
5L, 1L, 2L, 3L, 4L, 5L), groups = c("A", "A", "A", "A", "A", 
"B", "B", "B", "B", "B", "C", "C", "C", "C", "C")), .Names = c("x", 
"y", "groups"), row.names = c(NA, -15L), class = "data.frame")

xyplot(y~x|groups,xy,
           scales = list(x = list(relation = "free", 
                                at = rep(list(1:5),3), 
                                 labels =  list(c("Wk 1\nXXX", paste("Wk",
2:5)),
                                                      c("Wk 2\nXXX",
paste("Wk", 2:5)),
                                                     c("Wk 3\nXXX",
paste("Wk", 2:5)) ) )) 
)

The x axis labels are not a trivial thing. See

https://stat.ethz.ch/pipermail/r-help/2007-May/132818.html

This gives a little more control over things.

And this is it below

library(grid)

myXlabGrob <-
   function(...) ## ...is lab1, lab2, etc
{
   ## you can add arguments to textGrob for more control
   ## in the next line
   labs <- lapply(list(...), textGrob)
   nlabs <- length(labs)
   lab.heights <-
       lapply(labs,
              function(lab) unit(1, "grobheight", data = list(lab)))
   lab.layout <-
       grid.layout(ncol = nlabs, nrow = 1,
                   heights = do.call(max, lab.heights),
                   widths = unit(1, "null"),
                   respect = TRUE)
   lab.gf <- frameGrob(layout = lab.layout)
   for (i in seq_len(nlabs))
   {
       lab.gf <- placeGrob(lab.gf, labs[[i]], row = 1, col = i)
   }
   lab.gf
}

xyplot(1:9 ~ 1:9 | gl(3, 1, 9),
       layout = c(3, 1),
       xlab =
       myXlabGrob('Trial number',
                  'Subject number',
                  'Experimental condition'),
       strip = FALSE)

If you want to change the height for the labels I think you can change the
heights in grid.layout

There 

Regards

Duncan

Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mackay at northnet.com.au


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of David Winsemius
Sent: Wednesday, 12 February 2014 12:09
To: juliana Arruda de Matos
Cc: r-help at r-project.org
Subject: Re: [R] setting yaxis in logscale


On Feb 11, 2014, at 12:26 PM, juliana Arruda de Matos wrote:

> Hi all,
> 
> 
> 
> I´ve been trying hard to set up the yaxis in log scale as the Figure 3 in
the article below, but I couldn´t find out how to do it. Could anybody help
me?
> 
> 
> 
> http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0041936
> 

I'm pretty sure you can find a worked example using the lattice package at
Deepayan Sarkar's Lattice website. You would probably find a worked example
of setting up a datset which your posting fialed to include.

> 
> 	[[alternative HTML version deleted]]

Please read the Posting Guide.

______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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David Winsemius
Alameda, CA, USA

______________________________________________
R-help at r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.