Intro To Time Series Analysis Part 2 :Exercises

In the exercises below, we will explore more in Time Series analysis.The previous exercise is here,Please follow this in sequence
Answers to these exercises are available here.

Exercise 1

load the AirPassangers data,check its class and see the start and end of the series .

Exercise 2
check the cycle of the TimeSeries AirPassangers .

Exercise 3

create the lagplot using the gglagplot from the forecast package,check how the relationship changes as the lag increases

Exercise 4

Also plot the correlation for each of the lags , you can see when the lag is above 6 the correlation drops and again climbs up in 12 and again drops in 18 .
Exercise 5

Plot the histogram of the AirPassengers using gghistogram from forecast

Exercise 6

Use tsdisplay to plot autocorrelation , timeseries and partial autocorrelation together in a same plot

Exercise 7

Find the outliers in the timeseries .