List missing values

Source: R/Swrappers.R

Lists the missing values of selected columns of a DTSg object with recognised periodicity.

# S3 method for DTSg
nas(x, cols = self$cols(), ...)

Arguments

x

A DTSg object (S3 method only).

cols

A character vector specifying the columns whose missing values shall be listed. Another possibility is a character string containing either comma separated column names, for example, "x,y,z", or the start and end column separated by a colon, for example, "x:z".

...

Not used (S3 method only).

Value

Returns a data.table::data.table with five columns:

  • .col: the column name

  • .group: the ID of the missing values group within each column

  • .from: the first timestamp of the missing values group

  • .to: the last timestamp of the missing values group

  • .n: the number of missing values per group

See also

cols

Examples

# new DTSg object
x <- DTSg$new(values = flow)

# list missing values
## R6 method
x$nas()
#>    .col .group      .from        .to .n
#> 1: flow      1 2007-10-12 2007-10-24 13
#> 2: flow      2 2007-10-26 2007-11-03  9
#> 3: flow      3 2007-11-10 2007-11-10  1

## S3 method
nas(x = x)
#>    .col .group      .from        .to .n
#> 1: flow      1 2007-10-12 2007-10-24 13
#> 2: flow      2 2007-10-26 2007-11-03  9
#> 3: flow      3 2007-11-10 2007-11-10  1