Check if data file is importable

[loelschlaeger]

This code chunk

controls = list(
  states = 3,
  sdds   = "t",
  data   = list(file        = "dax.csv",
                date_column = "Date",
                data_column = "Close",
                logreturns  = TRUE,
                from        = "2015-01-01"),
  fit    = list("runs" = 14)
)
controls <- set_controls(controls)
data <- prepare_data(controls)

leads to an error if the last line in the file named "dax.csv" contains NA value(s). Implement checks for that.

[loelschlaeger]

Not relevant currently.