R devel - Jan 2001 - Disappearing x axis in plot.factor (PR#830)

Hi.

While there is an x-axis set up for:
> plot.factor(factor(1:3))
this axis is not present for
> plot.factor(factor(1:3), col="red")
which actually should just be the same as the first plot and call
barplot(table(.)), shouldn't it?  Where did the ticks and labels go?

Note that
> barplot (table(factor(1:3)), col="red")
has the x-axis.

Something funky is going on with axisnames or args in plot.factor that
I can't figure out.  The situation can be remedied
with
> plot.factor(factor(1:3), col="red", axes=TRUE)
alas, why do you need "axes=TRUE"?

Regards,
  -tom



Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk> writes:
> Thomas Vogels <tov@ece.cmu.edu> writes:
> 
> 
> > Now the (actually not so) funny thing is that the labels for the
> > x-axis disappear when I specify colors for the bars.  (R 1.2.1, Linux)
> > Ok, maybe the other thing I'll have to catch up on is the docu...
> 
> The logic around "axisnames" in plot.factor looks not quite
right.
> Could you file a bug report on this so that we dont forget?
> 
> barplot(table(factor(1:3)),col="green")
> plot(factor(1:3),col="green",axes=T)
> 
> both work, although the latter is clearly silly.

--please do not edit the information below--

Version:
 platform = i386-pc-linux-gnu
 arch = i386
 os = linux-gnu
 system = i386, linux-gnu
 status = 
 major = 1
 minor = 2.1
 year = 2001
 month = 01
 day = 15
 language = R

Search Path:
 .GlobalEnv, package:ctest, Autoloads, package:base



-- 
mailto:tov@ece.cmu.edu (Tom Vogels)   Tel: (412) 268-6638   FAX: -3204


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tov@ece.cmu.edu writes:
> Hi.
> 
> While there is an x-axis set up for:
> > plot.factor(factor(1:3))
> 
> this axis is not present for
> > plot.factor(factor(1:3), col="red")
> 
> which actually should just be the same as the first plot and call
> barplot(table(.)), shouldn't it?  Where did the ticks and labels go?
> 
> Note that
> > barplot (table(factor(1:3)), col="red")
> has the x-axis.
> 
> Something funky is going on with axisnames or args in plot.factor that
> I can't figure out.  The situation can be remedied with
> > plot.factor(factor(1:3), col="red", axes=TRUE)
> 
> alas, why do you need "axes=TRUE"?
Because of the logic of

        axisnames <- if (length(dargs <- list(...)) > 0) {
            nam <- names(dargs)
            ((any("axes" == nam) && dargs$axes) ||
(any("xaxt" ==
                nam) && dargs$xaxt != "n"))
        }

gives FALSE if there are any "..." arguments, and neither of axes= and
xaxt= are given.

I think the first part of plot.factor wants to be 

     if (missing(y) || is.factor(y)) {
	dargs <- list(...)
        axisnames <- if (!is.null(dargs$axes)) dargs$axes
	    else if (!is.null(dargs$xaxt)) dargs$xaxt != "n"
            else TRUE
    }

Anyone know better?

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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