Gorka questions

Gorka answers

• Show tooltip for only one layer in ggplot2 and plotly
• ifelse action depending on document type in rmarkdown
• How do I make a circular tree with multiple root trees
• Warning in install.packages: converting NULL pointer to R NULL
• unable to install.packages('arrow') to read parquet file (read_parquet). Any other way to read parquet file or use any different library?
• R: Why does the optimization solution from mco's nsga2 function not satisfy the constraints?