Error in intervals() for <= 3 events

[chguiterman]

When a composite has <= 3 fire events, intervals() fails with this message:

Error in stats::shapiro.test(x$intervals) : 
  sample size must be between 3 and 5000

[brews]

Is this a common issue?

stats::shapiro.test is pretty solid, maybe we just should catch this error and report NA, @chguiterman ?

[chguiterman]

That's a good idea @brews. We still want to be able to report the mean, but yes the statistical test of it is useless and should be skipped.