Pollution index forecasting


#1

Hi everyone,Forecast
I am trying to apply ARIMA model to predict future pollution level but when I’m plotting the graph after a certain point of time it becomes constant…


#2

Hey
Have you scaled back the predictions to their original scale ?
If yes, try altering the parameters.

Cheers


#3

try adding seasonality…to your model…
library(forecast)…
arima_mdl <- ARIMA(ts,order=c(2,1,2), seasonality=c(2,1,2),
include.constant=TRUE)…where ts is ur time series…

use predict or forecast function to predict…

reg.,
VG


#4

Did you try playing around with p and q values in your model.
Did you create the pcf and pacf charts? whats the AIC for your model?