ggethos fails with x of class datetime

[matiasandina]

This used to work, no longer the case, it outputs nothing.

ggplot(wombats_duration, aes(x = start_dt, y = wombat, colour = behaviour)) +
     geom_ethogram() +
     facet_wrap(~ trial, scales = "free")

Adding behaviour causes it to fail

ggplot(wombats_duration, aes(x = start_dt, y = wombat, behaviour = behaviour, colour = behaviour)) +
  geom_ethogram() +
  facet_wrap(~ trial, scales = "free")

Warning messages:
1: Computation failed in `stat_etho()`:
'x' must be a vector of an atomic type 
2: Computation failed in `stat_etho()`:
'x' must be a vector of an atomic type 
3: Computation failed in `stat_etho()`:
'x' must be a vector of an atomic type 
4: Computation failed in `stat_etho()`:
'x' must be a vector of an atomic type 

[matiasandina]

This is working with dplyr branch and with #16.

[matiasandina]

My bad...

This is the expected output

ggplot(filter(wombats_duration, wombat=="pomelo"), 
    aes(x = start_dt, xend=end_dt, y = wombat, behaviour = behaviour, colour = behaviour)) +
    geom_ethogram() + 
    facet_wrap(~trial, scales="free")

But we get

ggplot(filter(wombats_duration, wombat=="pomelo"), 
    aes(x = start_dt, y = wombat, behaviour = behaviour, colour = behaviour)) 
    geom_ethogram() + 
    facet_wrap(~trial, scales="free")

[matiasandina]

It has been working with class datetime fine...needs to be fully tested again