Plot failed to show after I added else NaN

[Cornel]

Hi,

Why without adding that else NaN at the final the plot is showing the waveform, but after that else NaN was added at the final of the function then the plot failed?

[terryhendicott · Accepted solution]

Need mutually exclusive if branches or it always retuns NAN's at t<=2a

[Werner_E]

I find it easier to use explicit return statements.