Chris Holbrook questions

Chris Holbrook answers

• RowSums conditional on value
• how to enter several empty rows in a df based on a string within a column
• How to properly handle timezone when passing POSIXct objects between R and Postgres DBMS?
• R survival package; plotting log(-log(survival)) against log(time)
• How to render a gganimate graph in html using rmarkdown::render(), without generating unwanted output
• Popup when hover with leaflet in R?
• How do you convert dates/times from one time zone to another in R?
• Stopping R from appending .1, etc as suffix on header character vectors when called using colnames