Converts the entries of an H2OFrame object from milliseconds to hours of the day (on a 0 to 23 scale).
Examples
if (FALSE) { # \dontrun{
library(h2o)
h2o.init()
f <- "https://s3.amazonaws.com/h2o-public-test-data/smalldata/jira/v-11-eurodate.csv"
hdf <- h2o.importFile(f)
h2o.hour(hdf["ds9"])
} # }