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.
add_span_counter(data, span_size)
data |
data.frame |
span_size |
integer |
data.frame with extra variable "span_counter".
## Not run: # add_span_counter(pedestrian, span_size = 100) ## End(Not run)
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