memisc with data.table

[melff]

memisc with data.table

[melff]

You are using annotation etc. in a way they are not intended:

• annotation etc. are supposed only to work with objects of class "item" which are expected to be in a "data.set" object rather than a "data.frame" or "data.table" object.
• There is no support for "data.table" objects yet.

To get what you apparently want, try:

library(memisc)
library(data.table)

data(mtcars)
## This is necessary to get things working ...
mtcars <- as.data.set(mtcars)

mtcars <- within(mtcars, {

  description(vs) <- "whatever"
  description(am) <- "something unclear"
  description(carb) <- "something different"
  wording(vs) <- "this is going to be a long comment"

  labels(vs) <- c(
    "many" = 1,
    "not so many" = 0
  )

  labels(carb) <- c(
    "one" = 1,
    "two" = 2,
    "three" = 3
  )

  missing.values(carb) <- c(4,6, 8)
})

codebook(mtcars) 
annotation(mtcars) <- "my long story"
annotation(mtcars)
mtcars

## To get a data frame, use
# as.data.frame(mtcars)