Stigmery / Docs / Observation - plots & monitors

Observation - plots & monitors

A model isn't useful unless you can see what's happening. Two ways:

Metrics

A metric is a named expression evaluated each tick over the whole model. They live in model.metrics and act as the data source for both plots and monitors.

sheep_count:   count(agents_of_type('sheep'))
grass_total:   sum(all_patches().map(p => p.grass))

Plots

A plot charts one or more metrics over time. Each line is called a pen; you choose its colour. Plots live in the Observation panel on the Interface tab.

Monitors

A monitor shows the current value of one metric, big and live. Use them for single-number dashboards (population, total energy, ...).

Exporting

Open the model in the library and use the ⬇ download icon on the file row to grab the full JSON. Run-time metric history can later be exported as CSV (planned).