[R] scientific vs. fixed notation in xyplot()

Tue Sep 28 02:28:22 CEST 2010

I found where the problem is with y-axis, the yscale.components.log10 should be

yscale.components.log10 <- function(lim, ...) { 
    ans <- yscale.components.default(lim = lim, ...)
    tick.at <- logTicks(10^lim,loc=1)
    ans$left$ticks$at <- log(tick.at, 10)
    ans$left$labels$at <- log(tick.at, 10)
    ans$left$labels$labels <- as.character(tick.at)
    ans } 

----- Original Message ----
From: array chip <arrayprofile at yahoo.com>
To: Don McKenzie <dmck at u.washington.edu>; Henrique Dallazuanna 
<wwwhsd at gmail.com>
Cc: R-help Forum <r-help at r-project.org>
Sent: Mon, September 27, 2010 3:09:20 PM
Subject: Re: [R] scientific vs. fixed notation in xyplot()

Hi, I found an old thread which refered to 2 examples (Fig 8.4 & Fig 8.5) from 
Dr. Sarkar's lattice book that address this problem using "xscale.components" 
and "yscale.components":

http://lmdvr.r-forge.r-project.org/figures/figures.html

I am able to change the label of x-axis, but still can't change the y-axis 
label. I think it's straight forward, but can't figure out what I am missing in 
the code, Can anyone suggest?

logTicks <- function (lim, loc = c(1, 5)) { 
    ii <- floor(log10(range(lim))) + c(-1, 2) 
    main <- 10^(ii[1]:ii[2]) 
    r <- as.numeric(outer(loc, main, "*")) 
    r[lim[1] <= r & r <= lim[2]] } 

xscale.components.log10 <- function(lim, ...) { 
    ans <- xscale.components.default(lim = lim, ...)
    tick.at <- logTicks(10^lim,loc=1)
    ans$bottom$ticks$at <- log(tick.at, 10)
    ans$bottom$labels$at <- log(tick.at, 10)
    ans$bottom$labels$labels <- as.character(tick.at)
    ans } 

yscale.components.log10 <- function(lim, ...) { 
    ans <- yscale.components.default(lim = lim, ...)
    tick.at <- logTicks(10^lim,loc=1)
    ans$bottom$ticks$at <- log(tick.at, 10)
    ans$bottom$labels$at <- log(tick.at, 10)
    ans$bottom$labels$labels <- as.character(tick.at)
    ans } 

xyplot(1:10000~1:10000, scales=list(log=T),xscale.components = 
xscale.components.log10,yscale.components = yscale.components.log10)

Any suggestions?

Thanks

John

----- Original Message ----
From: Don McKenzie <dmck at u.washington.edu>
To: Henrique Dallazuanna <wwwhsd at gmail.com>
Cc: R-help Forum <r-help at r-project.org>
Sent: Mon, September 27, 2010 1:00:04 PM
Subject: Re: [R] scientific vs. fixed notation in xyplot()

This is quite elegant (thanks) and brings up a problem I could not solve awhile 
back, although Dr. Sarkar did his best to help.
How do I do the same thing in a panel plot?

e.g., toy example

temp.df <- 
data.frame(X=seq(1,100,by=1),Y=seq(1,50.5,by=.5),class=rep(c("A","B"),each=50))
xyplot(Y ~ X | class,data=temp.df,scales=list(x=round(log(1:100), 
4),y=round(log(1:50.5), 4),log=T))

gives me the right points on the page but still gives axis labels in scientific 
notation.

If I try to specify "labels" as a list I get an error message

> xyplot(Y ~ X | class,data=temp.df,scales=list(log = T, labels = 
>list(x=round(log(1:100), 4),y=round(log(1:50.5), 4))))

Error in construct.scales(log = TRUE, labels = list(x = c(0, 0.6931, 1.0986,  :
  the at and labels components of scales may not be lists when relation = same

Syntax problem in this last command?

Thanks

On 27-Sep-10, at 12:16 PM, Henrique Dallazuanna wrote:

> Try this:
> 
>  xyplot(1:10~1:10, scales=list(log = T, labels = round(log(1:10), 4)))
> 
> 
> On Mon, Sep 27, 2010 at 4:10 PM, array chip <arrayprofile at yahoo.com> wrote:
> 
>> Hi I am using xyplot() to plot on the log scale by using scale=list(log=T)
>> argument. For example:
>> 
>> xyplot(1:10~1:10, scales=list(log=T))
>> 
>> But the axis labels are printed as scientific notation (10^0.0, etc),
>> instead of
>> fixed notation. How can I change that to fixed notation?
>> 
>> options(scipen=4) doesn't work on xyplot()
>> 
>> Thanks
>> 
>> John
> 
> --Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
> 
>     [[alternative HTML version deleted]]
> 
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Don McKenzie, Research Ecologist
Pacific WIldland Fire Sciences Lab
US Forest Service

Affiliate Professor
School of Forest Resources, College of the Environment
CSES Climate Impacts Group
University of Washington

desk: 206-732-7824
cell: 206-321-5966
dmck at uw.edu
donaldmckenzie at fs.fed.us

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