Thanks, Frank. I am an old newbie, so your advice was not
straightforward to me, but it nudged me to look at the structure of
the contents object. I did solve the problem by passing the contents
data frame in the contents object. Using the example dfr from Dieter,
> g <- contents(dfr)
> g
Data frame:dfr 20 observations and 2 variables Maximum # NAs:0
Levels Storage
x double
y 2 integer
+--------+-----------+
|Variable|Levels |
+--------+-----------+
| y |female,male|
+--------+-----------+
> str(g)
List of 6
$ contents :'data.frame': 2 obs. of 2 variables:
..$ Levels : int [1:2] 0 2
..$ Storage: Factor w/ 2 levels "double","integer": 1 2
$ dim : int [1:2] 20 2
$ maxnas : int 0
$ dfname : chr "dfr"
$ Levels :List of 1
..$ y: chr [1:2] "female" "male"
$ longLabels: NULL
- attr(*, "class")= chr "contents.data.frame"
> g$contents
Levels Storage
x 0 double
y 2 integer
latex(g$contents, caption='hello', label='mylabel',file='')
This may be useful to others. But sounds like this has not been a
high traffic issue!
- Mike
On Dec 30, 2008, at 8:35 AM, Frank E Harrell Jr wrote:
J Michael Dean wrote:
Thanks, Dieter, for your response shown below.
library(Hmisc)
dfr <- data.frame(x=rnorm(20),y=sample(c('male','female'),20,TRUE))
cnt <- contents(dfr)
latex(cnt,label="tab:mytab",caption="This is a caption")
The problem is that I only want to display cnt[1] - I am simply
making a table that shows the structure of a dataframe, and I do
not want the variable levels from contents.
> class(cnt)
[1] "contents.data.frame"
> class(cnt[1])
[1] "list"
When I execute your example, it does work, but if I change it to
latex(cnt[1]...) then the caption and label do not work because
latex.list() is executed.
- Mike
What we really need is a latex method for contents. As I usually
include latex(describe(mydata), file='') in an Sweave report I
haven't needed this. If any others need it I'll probably write
latex.contents.data.frame. In the meantime you can take the object
produced by contents( ) and remove the value levels components, then
pass the smaller object to latex().
Frank
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt
University
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