Ticks on the inside of axes?

[Robert Buitenwerf]

Hello,

Does anyone know if it is possible to place tick marks on the inside of axes? This is a requirement for a bunch of journals so I imagine it to be possible, I just can't figure out how... 

I tried making the length negative, e.g.

+opts(axis.ticks.length=unit(-1,"cm"))

Which places the x-axis ticks on the inside, but does not show any ticks on the y-axis. It appears to me that the y-axis ticks are "hiding" behind the plot, because when I increase their size, e.g. 

+opts(axis.ticks=theme_segment(size=5))

I can see them just sticking out....  

Any advice would be greatly appreciated!

Robert

[Hadley Wickham]

No it's not possible because I think it's a really bad idea for ticks
to potentially interfere with data. You're on your own, sorry.

Hadley

On Friday, June 10, 2011, Robert Buitenwerf

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[JiHO]

On Fri, Jun 10, 2011 at 16:51, Hadley Wickham <had...@rice.edu> wrote:
> No it's not possible because I think it's a really bad idea for ticks
> to potentially interfere with data. You're on your own, sorry.

If your journal really can't accept anything else, I see two solutions:
- editing your axes on the EPS/PDF file in Inkscape http://www.inkscape.org
- edit the theme to have no ticks, use scale_x/y_continuous to specify
breaks manually, plot the same breaks on the inside of the graphic
with geom_rug

JiHO
---
http://maururu.net

[James Rome]

It is a good idea to have the ticks inward option. The Plasma Physics
journals require them inward also.

JiHO
---
http://maururu.net

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James A. Rome
E-mail: jame...@gmail.com
URL: http://jamesrome.net

[Michael Bach]

On Jun 12, 3:25 pm, JiHO <jo.li...@gmail.com> wrote:
> If your journal really can't accept anything else, I see two solutions:

> - editing your axes on the EPS/PDF file in Inkscapehttp://www.inkscape.org

> - edit the theme to have no ticks, use scale_x/y_continuous to specify
> breaks manually, plot the same breaks on the inside of the graphic
> with geom_rug

Thanks for the suggestion JiHO. I think the OP also wanted to have
inside tick marks on the opposite side of the axes, i.e. a plot like
gnuplot produces by default. Can this also be achieved with geom_rug?

Michael

[JiHO]

I don't think so. It is also the default in MATLAB. My point of view
is that they are a visual aid similar (but less powerful) than
ggplot's grid, hence their uselessness in ggplot.

If you really want them, just modify the plot to suit the journal in Inkscape.

JiHO
---
http://maururu.net

[Michael Bach]

On Jun 15, 3:03 pm, JiHO <jo.li...@gmail.com> wrote:
> I don't think so. It is also the default in MATLAB. My point of view
> is that they are a visual aid similar (but less powerful) than
> ggplot's grid, hence their uselessness in ggplot.

Agreed. I just asked because some of our foreign collaborators also
want the ticks this way. Regarding OP's intent: I assumed this because
gnuplot and MATLAB (thanks for the tip) style is maybe how people used
to these tools expect a plot to look like.

> If you really want them, just modify the plot to suit the journal in Inkscape.

"The Last Resort". Fair enough, but cumbersome and as I said it is not
for a specific journal, but for regular reports to collaborators.
Hadley Wickham made his point quite clear, so I do not expect this
feature to get implemented soon (if ever).

Michael

[baptiste auguie]

If you're desperate for it, a trivial modification to geom_rug would
allow this. The only downside is that you'll always have to specify
the breaks manually.

There seems to be something odd with the clipping in ggplot2; I
couldn't find a way to turn it off for the y axis for some reason
(grep clip R/*.r , changed all occurrences to "off").

Best,

baptiste

[Paulo Eduardo Cardoso]

"No it's not possible because I think it's a really bad idea for ticks to potentially interfere with data. You're on your own, sorry.

Hadley"

Actually placing ticks inside the plot area is a requirement for some peer review magazines. Maps are required to be presented with ticks inside plot area (Oryx for example but many others).