[R] Underline only colnames in grid.table

[Paul Murrell]

Hi

On 29/10/2010 7:55 p.m., robbert blonk wrote:
>
> Dear all,
>
> I would like to underline only the colnames in a table as e.g.
>
> grid.draw(tableGrob(head(iris, 10), name="test"))
>
> I can imagine you should use grid.edit or so, bu I can't figure out
> how...
>
> Does anyone have a suggestion?

Unfortunately, grid.edit() won't help here because the table is all 
drawn on-the-fly ; the only thing you can see is the overall table grob.

You can see the viewports that are used to draw the table, but the 
downside there is that they do not have very useful names.

The following code draws the table, then looks into the viewport tree to 
get the name of the 12th table viewport (which is the first viewport on 
the second column), navigates down to that viewport, then draws a line 
along the bottom.

grid.table(head(iris, 10), name="test")
downViewport(current.vpTree()$children[[1]]$children[[12]]$name)
grid.segments(0, 0, 1, 0)

Not a very general solution, but may provide a one-off workaround.

Is that what you meant?

Paul

> Thanks Robbert
>
> windows xp R 2.10.1
>

-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/