BRCN questions

• RShiny print current page
• R DataTables do not display Buttons and Length Menu simultaneously
• Does R always return NA as a coefficient as a result of linear regression with unnecessary variables?
• Drawing extra markers on a leaflet map with addDrawToolbar in R
• How to save a leaflet map with drawn shapes/points on it in Shiny?
• How to add a text on a leaflet map?

BRCN answers