View State Activity by Using the Simulation Data Inspector
You can use the Simulation Data Inspector to log state activity and data for your Stateflow® chart in a Simulink® model. With the Simulation Data Inspector, you can view and compare:
Data from your chart
Leaf chart activity
Child chart activity
Child state activity
Self state activity
Leaf state activity
Log to the Simulation Data Inspector from Stateflow
In this exercise, you use the Simulation Data Inspector to monitor the active
state outputs for the Stateflow chart in the model sf_car.
To log a signal with the Simulation Data Inspector, highlight the signal line that
you want to log. Right-click the gear signal and choose
Log Selected Signals from the context menu. A logging
badge appears next to the gear signal, indicating that the data
from that signal is logged when the model is run.
The logging badge 
marks logged signals in the model.
To log the active state data from gear_state:
Open the Stateflow chart.
To select
gear_state, clickgear_state.On the Simulink Editor toolbar, in the Simulation tab, click Log Child Activity.
After running one or more simulations with signals marked for logging, click
Simulation Data Inspector button
on the Simulink editor toolbar and view your data. Multiple runs show up in the
Inspect pane and can be viewed together. To choose which
signals you want to plot, use the check boxes next to the signal names.
