Performs differencing of multiple time series, with possibly different orders for each time series.
diff_mult(data, d, keep_NAs = TRUE)
The appropriately differenced data in the same format as the original data.
A (\(T\)x\(N\))-matrix of \(N\) time series with \(T\) observations. Data may also be in a time series format (e.g. ts
, zoo
or xts
) or data frame.
An \(N\)-dimensional vector containing the orders
Logical indicator whether or not to keep the NA
values resulting from differencing at the beginning of the sample. Default is TRUE
. If FALSE
, the entire row containing the NA
values is removed.
Smeekes, S. and Wilms, I. (2023). bootUR: An R Package for Bootstrap Unit Root Tests. Journal of Statistical Software, 106(12), 1-39.