This example shows how to use the MinMax block to output the maximum value of two sine waves.
After running the full simulation, you can view the results in the Scope. Initially, the maximum value (orange line) tracks SineWave2. When the SineWave2 values turn negative, the maximum value begins tracking SineWave1. When the SineWave2 values become positive again, the maximum value resumes tracking SineWave2.
ans = Simulink.SimulationOutput: tout: [57x1 double] SimulationMetadata: [1x1 Simulink.SimulationMetadata] ErrorMessage: [0x0 char]