Exercise

Visual assessment of seasonality

The first step when analyzing time series should be to construct graphical summaries that provide insight into important features such as trend, seasonality and possible anomalies. In this exercise, you'll use several plots to explore thenitrate concentrations as a time series and to identify the period of any seasonal patterns that might be present.

Instructions 1/3

undefined XP

1
2
3

Use a plot to show nitrate concentrations varying by the time index in the index column.
Set the argument type = "o" to display a sequence of points connected by lines.