[SOLVED] R: Plot trees from h2o.download_mojo(), keep encountering error

R: Plot trees from h2o.download_mojo(), keep encountering error

I keep encountering errors when I'm trying to plot trees from h2o.download_mojo(). I followed the official instructions:

# Now download the latest stable h2o release from http://www.h2o.ai/download/
# and run the PrintMojo tool from the command line.
#
# (For MacOS: brew install graphviz)
java -cp h2o.jar hex.genmodel.tools.PrintMojo --tree 0 -i model.zip -o model.gv -f 20 -d 3
dot -Tpng model.gv -o model.png
open model.png

I've made sure I use the latest stable h2o and graphviz installed, while I keep getting this error:

java -cp h2o.jar hex.genmodel.tools.PrintMojo --tree 0 -i model.zip -o model.gv -f 20 -d 3
Error: Could not find or load main class hex.genmodel.tools.PrintMojo

dot -Tpng model.gv -o model.png
Error: dot: can't open model.gv

I'm not familiar with java. It will be great if somebody can help me with this. Thanks very much!

Solution

Looks like when you pasted the command, you missed the java - part