What we can learn from time series visualizations
Visualizing time series data can help detect patterns, outliers that defy those patterns, whether the data is stationary or non-stationary, and whether there is correlation between the variables. For example, a time series line graph (also called a timeplot) displays values against time. It is similar to x-y graphs but displays only time on the x-axis. Time series graphs can take more complex forms that provide more context about the data.