Custom Expression Editor and Chart

In Markov Chain Charts Carousel, you can obviously see lots of useful charts for the various perspectives of the Markov chain. You can get a forecast of a specific state. But, what about a composite state, like [State A] AND [State B] OR [State C] AND NOT [State D].

Yes, you can create a custom expression like that and see the forecast chart for such a composite state.

In the carousel, select the Custom Expression panel, as shown below. Then, Enter an expression like this.

Markov Chain Calculator Custom Expression panel with the formula Sunny Day OR Rainy Day built from the Symbols list, marked The expression is valid, with a callout noting that states can be dragged and dropped into the editor.

Then, select the Chart tab to see the forecast of this compound state. Naturally, the result of this expression will be always 1, as those states are mutually exclusive. The chart tab shows that result.

Markov Chain Calculator Chart tab showing the Calculated State for Sunny Day OR Rainy Day staying constant at probability 1 across iterations 1 through 5, as expected for a mutually-exclusive partition of the state space.

You can always get help about what math functions are available to use in the expression editor. Just click the Help Icon shown in the Editor and the help tip popup will be displayed.