Plotting

plot_index(hpi[, show_imputed, smooth])	Plot an index.
plot_index_accuracy(error_df[, size])	Plot index accuracy.
plot_index_volatility(volatility_df)	Plot index volatility.
plot_series(source[, smooth])	Plot an index series.
plot_series_accuracy(source[, measure, smooth])	Plot accuracy for index series.
plot_series_volatility(source[, smooth])	Plot volatility for index series.
plot_series_revision(source[, measure, smooth])	Plot revision for index series.