1: arima ----</span>
<span class="va">model_fit_arima</span><span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/pkg/modeltime/man/arima_reg.html">arima_reg</a></span><span class="op">(</span>non_seasonal_ar <span class="op">=</span> <span class="fl">0</span>,
                            non_seasonal_differences <span class="op">=</span> <span class="fl">1</span>,
                            non_seasonal_ma <span class="op">=</span> <span class="fl">1</span>,
                            s