I have a problem with fitting fitafirma function.
I do have this code:
fitarfima <- autoarfima(data = bby_ts, ar.max = 0,
ma.max = 0, criterion = "AIC", method = "full")
But I get the following error
Error in apply(d[, 1:ar.max, ], 1, "sum") : dim(X) must have a positive length
My ts data is a simple vector with 2 columns. Could you help? Thanks!