On Jan 31, 2011, at 8:45 PM, Gundala Viswanath wrote:
Dear sirs,
I have a data that is generated like this:
dat1 <- data.frame(V1 = rep(1, 5), V2 = sample(c(40:45), 5))
dat2 <- data.frame(V1 = sample(c(0,1), 5, replace = TRUE), V2 =
sample(c(40:45), 5, replace = TRUE))
What I want to do is to obtain a data frame that contain list of list.
hiv
$hiv.dat1
$hiv.dat1$V1[[1]]
[1] 1 1 1 1 1
$hiv.dat1$V2[[1]]
[1] 41 42 43 40 44
$hiv.dat2
$hiv.dat2$V1[[1]]
[1] 0 1 1 0 0
$hiv.dat2$V2[[1]]
[1] 42 43 40 44 43
But why this line of command failed to create that?
hiv <- list(hiv.dat1 = as.list(dat1), hiv.dat2 = as.list(dat2))
Especially it gives "$hiv.dat1$V1" instead of "$hiv.dat1$V1[[1]]".
But that _is_ a list of lists. Two lists, each with two sub-lists
hiv$hiv.dat1$V1[[1]] is just the element "1". It is not a list.
How can we correct that?
I need this particular data structure required for a specific
package (ROCR).
To do what operation or procedure?
--
David Winsemius, MD
West Hartford, CT
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