Marta questions

• Convert a date string "yyyy-mm-dd" to milliseconds since epoch
• PIG subtract two dates
• R shiny uncheck checkboxGroup with actionbutton
• R shiny display formula
• R shiny open the URLs from renderTable in a new tab
• Installing RPostgreSQL on Linux
• R shiny color dataframe
• R time-series forecasting with auto.arima and xreg=explanatory variables
• R Shiny display checkboxGroupInput horizontally
• R shiny table with dates

Marta answers