4.6.1 Browser Analyses: “Explore Data”
Six analyses have been included in FlowCast to explore the predictor and predictand time-series input data. Analyses include:
- Time-series explorer analysis: This allows the user to zoom, pan, inspect, compare and overlay different time-series data. To help compare multiple data, the horizontal axes are automatically synchronized, while synchronization of the vertical axes is optional. A time-line user-control at the bottom of the window can also be used for navigation. Time-series can be shown as daily (if originally in that format), monthly, or yearly formats. Passing the mouse over individual data displays their values. Missing data is represented as gaps in the time-series. Box-plots and bar charts can be draw underneath each time-series representing monthly statistics (max, min, mean, etc). Annual shading can also be underlain to help distinguish alternate years.
- Monthly statistics analysis: Presents monthly statistics including maximum, minimum, median, mean, and the 25th and 75th percentiles. Outputs can be displayed as box plots, bar charts or line charts.
- Analogue analysis: Shows bar graphs of the predictor and predictand analogue totals (or averages) based on the periods defined in the period setter tool.
- Available/missing-data analysis: Stacked Gantt bars showing either the available data periods or missing data sections in daily, monthly or yearly formats. A time-line control at the bottom of the window is also available for navigation.
- Frequency distribution analysis: User-definable frequency distribution bar charts with axis synchronization options.
- Scatter plot/regression analysis. Dragging and dropping time-series onto each other in the input panel creates the scatter-plots. Several regression options are available, and individual points are hot-tracked to display the dates. Scatter plots are switchable between daily, monthly and yearly formats.
Figure 9: Examples of Browser analyses outputs include (a) time-series explorer; (b) monthly statistics analysis; (c) analogue analysis; (d) available/missing-data analysis; (e) frequency distribution analysis; and (f) scatter plot analysis.