Marco Fumagalli questions

• backward count in a numpy array
• Plotting tetrahedron with data points in R
• Change filename when downloading data from datatable R
• h2o warning message too old cluster
• airflow webserver started but UI doesn't show in browser
• Wordcloud with a specific shape [closed]
• pandas read_json: "If using all scalar values, you must pass an index"

Marco Fumagalli answers