1.

What is a time series plot? Explain using an example.

Answer»

A time-series is a plot where all the MEASUREMENTS are plotted sequentially. Time here is represented ALONG the x-axis while the VARIABLE of interest is a plot on the y-axis. For many data, among which environmental observations, taking a look at their temporal pattern may be extremely useful for gaining insight into their behaviour.

In many cases, the variable time is underestimated. However, time-series are extremely useful to DETERMINE the temporal pattern of a variable.

We take an example of sample dataset called “nottem” in R which captures average monthly temperatures at Nottingham, between 1920 to 1939.

str(nottem) head(nottem) plot(nottem)

The chart shows x1 (which is the average TEMPERATURE of the city) over a period of time for around 19-20 years.



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