[R] [ggplot] controlling axis and major/minor tick marks

[Sebastian Weber]

Hi Hadley!

> axis.colour should control the colour of the tickmarks, the axis
> labels, and the line which the ticks attach to.  What is not working
> in your case?  grid.colour only effects the grid lines inside the
> plot.

Well, I used gopt to set the following global defaults for my plots:

> ggopt()
List of 11
 $ aspect.ratio     : num 0.618
 $ axis.colour      : chr "black"
 $ background.colour: chr "black"
 $ background.fill  : chr "white"
 $ grid.colour      : chr "white"
 $ grid.fill        : chr "white"
 $ legend.position  : chr "right"
 $ save             : logi FALSE
 $ strip.gp         :List of 3
  ..$ col : chr "white"
  ..$ fill: chr "grey80"
  ..$ lwd : num 3
  ..- attr(*, "class")= chr "gpar"
 $ strip.text       :function (variable, value)  
 $ strip.text.gp    : list()
  ..- attr(*, "class")= chr "gpar"
 - attr(*, "class")= chr "options"
> 

Then I plot my stuff with

p2 <- ggplot(knn, . ~ power ,  aes=list(y=log10(k2m/(degree*kSize)),
x=log10(degree), shape=alpha))
p2 <- ggpoint(p2)
p2

and I do not see any axis at all. The tick marks are there, they are
black as they should.

By the way, I already wondered why I can not change the shapes of the
symbols in use. I figured that they are set statically in map_shapes.
How about introducing an option for this somewhere?

> 
> Currently, ggplot has no notion of major and minor tick marks (mainly
> because I don't have a good algorithim to generate them), but it is on
> my to do list.

I definetly need minor tick marks and will hack my way through ggplot to
acheive this if it does not seem to difficult to me. May you give me a
tip where to start / where should I have to modify things.


Regards,

Sebastian

> 
> Regards,
> 
> Hadley
> 
> On 10/31/06, Sebastian Weber <sebastian.weber at physik.tu-darmstadt.de> wrote:
> > Hello there!
> >
> > I'm starting with ggplot and was wondering how I could control the axis
> > of a plot. I would like the axis of the plot to be drawn black which I
> > thought to acheive with the option axis.colour="black". However, this
> > had no real effect on the plot. Then I found grid.colour which I changed
> > to black as well. Now I got my axis as I wanted them, but ggplot now
> > draws the grid inside the plot with black lines as well, which definetly
> > do not want to appear. So how can I get a black border around my plots?
> > Furthermore, I would like to indicate positions of major and minor ticks
> > in my plots. Where can I do this?
> >
> > Thanks in advance.
> >
> > Greetings,
> >
> > Sebastian
> >
> > Ah, I use R 2.3.1 and ggplot 0.4.0, if that is important ...
> >
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