I've been working my way through the flow core demo codec and encountered a problem on line 157:
> summary(filter(smaller[],rectGate %&% morphGate))
Error in as.vector(data) :
no method for coercing this S4 class to a vector
> summary(filter(smaller[],rectGate & morphGate))
Fluorescence Region and MorphologyGate+: 7193 of 8312 events (86.54%)
Is the operator really supposed to be %&% in this code?