R help - Jun 2008 - Matrix of data frames

Dear R-Users,

Is there a way to create a matrix of data frames in R ?

I am pulling in data frames from a SQL database into R using RODBC. I 
would like to pull in a sequence of data frames which are indexed across 
two dimensions, and store each data frame as an element in a matrix.

I did try this:

names<-c("foo","bar")
years<-c("1y","2y")

tr<-outer(names,years,
        function(t,y)
        sqlQuery(channel,
                paste("get_names_and_years '",
                        y,
                        "','",
                        t,
                        "'",
                        sep="")
        )
)

But, as you can imagine, this does not work, as outer returns a matrix 
object, which only holds number and not generic objects like data frames.

Thanks in advance,
Tolga

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On Thu, Jun 5, 2008 at 4:22 PM,  <tolga.i.uzuner at jpmorgan.com>
wrote:
> Dear R-Users,
>
> Is there a way to create a matrix of data frames in R ?

Using builtin BOD and women:
> m <- matrix(list(BOD, women, women, BOD), 2)
> m[[1,2]] # women
   height weight
1      58    115
2      59    117
3      60    120
4      61    123
5      62    126
6      63    129
7      64    132
8      65    135
9      66    139
10     67    142
11     68    146
12     69    150
13     70    154
14     71    159
15     72    164