My question is motivated by dealing with pairs of values, like (3,12.5),
(16,2.98), and so on
that are mapped to a cartesian plain (Time, Frequence)
I miss C multidimensional arrays. I am trying to simulate the 3rd dimension by
declaring a matrix of lists.
R seems to accept the definition of such a matrix. But I'm experiencing some
difficulty at storing pairs of data
in it. In the following are some of my attempts.
I would greatly appreciate some help.
> A <- matrix(data ="list", nrow=2, ncol=4)
> A
[,1] [,2] [,3] [,4]
[1,] "list" "list" "list" "list"
[2,] "list" "list" "list" "list"
> A[[1]] <- list(data="12.3",variable="d1")
Error in A[[1]] <- list(data = "12.3", variable = "d1") :
more elements supplied than there are to replace
> A[1,2] <- list(data="12.3",variable="d1")
Error in A[1, 2] <- list(data = "12.3", variable = "d1") :
number of items to replace is not a multiple of replacement length
> A[[1,2]] <- list(data="12.3",variable="d1")
Error in A[[1, 2]] <- list(data = "12.3", variable = "d1") :
more elements supplied than there are to replace
> A[[1,1]] <- list(data="12.3",variable="d1")
Error in A[[1, 1]] <- list(data = "12.3", variable = "d1") :
more elements supplied than there are to replace
> A[[1]][1] <- 10
> A[[1]][2] <- "f1-t1"
Error in A[[1]][2] <- "f1-t1" :
more elements supplied than there are to replace
> A[[1]][2] <- "d1"
Error in A[[1]][2] <- "d1" :
more elements supplied than there are to replace
Regards,
Maura
tutti i telefonini TIM!
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