Add a counter variable for a span of dataframe

Adds a variable, span_counter to a dataframe. Used internally to facilitate counting of missing values over a given span.

Usage

add_span_counter(data, span_size)

Arguments

data

data.frame

span_size

integer

Value

data.frame with extra variable "span_counter".

Examples

if (FALSE) { # \dontrun{
# add_span_counter(pedestrian, span_size = 100)
} # }