I have found a strange error:

> fit = Arima(flow, c(1,0,1), list(order=c(0,1,1), period=96*7))
Error in makeARIMA(trarma[[1L]], trarma[[2L]], Delta, kappa) :
  maximum supported lag is 350

Is in fact quite common to have a lag > 350 using a weekly period in 15min steps = 672 (standard in traffic flow prediction litterature for example).

Is there any reasons against doing what is suggested in the comment and avoid the hardcoded limit?

Thanks,
Matteo Bertini



# https://svn.r-project.org/R/trunk/src/library/stats/src/arima.c
SEXP getQ0(SEXP sPhi, SEXP sTheta)
{

[----8<----]

    /* This is the limit using an int index.  We could use
       size_t and get more on a 64-bit system,
       but there seems no practical need. */
    if(r > 350) error(_("maximum supported lag is 350"));

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