This function is used internally by prepareSequences. Handles empty and NA data in a multivariate time-series in two possible ways: 1) deleting rows with NA or empty cases; 2) replacing NA data with zeros.

handleNA(
  sequence = NULL,
  if.empty.cases = "zero"
  )

Arguments

sequence

Dataframe, a multivariate time-series.

if.empty.cases

character, one of: "omit" (default), "zero". When "omit", the function removes every row with at least one empty/NA record. When "zero", empty/NA data is replaced with zeros.

Value

A dataframe with the same columns as sequence.

Examples

data(sequenceB) B.sequence <- handleNA( sequence = sequenceB, if.empty.cases = "zero" )