The package h2o comes from the H2O.ai company. With it, you can train several machine learning models, including feedforward neural networks. Although the commands will be passed through the R console, the heavy lift will be done using Java— the h2o package for R is actually an interface.
That said, having Java installed is a requirement. If you are sure about having Java installed, make sure the h2o package is installed too:
install.packages('h2o')
Now we need to load the h2o library and initiate the package:
library(h20)h2o.init(nthreads=-1, max_mem_size='2G')
The h2o.init() function will initialize and connect to h2O. The nthreads=-1 argument will demand all available CPUs' cores to ...