extract_indices: Extract row, time and DO indices from a subset dataframe
Description
This is an internal function. Extracts row, time and DO values from a data
subset in a list.
Usage
extract_indices(x, subsets, n)
Value
A `data.table`` object.
Arguments
- x
data frame.
- subsets
list of data frames.
- n
numeric. Choose which subset in the list to extract data from.