h2o.colnames(x)

## Not run: 
library(h2o)
h2o.init()

frame <- h2o.createFrame(rows = 6, cols = 2,
                         categorical_fraction = 0.0, 
                         missing_fraction = 0.7, 
                         seed = 123)
h2o.colnames(frame)

## End(Not run)