DTSg (version 2.0.0)

nas.DTSg: List missing values

Description

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

Usage

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

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

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).

See Also

cols

Examples

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

# list missing values
## R6 method
x$nas()

## S3 method
nas(x = x)