Target Diagram Example 6

How to create a target diagram with overlaid markers.

A sixth example of how to create a target diagram given one set of reference observations and multiple model predictions for the quantity.

This example is a variation on the third example (target3) where now a fourth data point having a negative bias is overlaid on an existing target diagram that already has 3 data points with positive bias. It is chosen to have the first 3 data points appear in red while the fourth data point is displayed in blue.

All functions in the Skill Metrics Toolbox are designed to only work with one-dimensional arrays, e.g. time series of observations at a selected location. The one-dimensional data are read in as data structures via a mat file. The latter are stored in data structures in the format: ref.data, pred1.data, pred2.dat, and pred3.dat. The plot is written to a file in Portable Network Graphics (PNG) format.

The reference data used in this example are cell concentrations of a phytoplankton collected from cruise surveys at selected locations and time. The model predictions are from three different simulations that have been space-time interpolated to the location and time of the sample collection.