B. Davis questions

• filter data by maximum group sample size with duplicate maximum values
• Calculate the euclidean distance between points within grouped data
• Match grouping variable with stripping/shading using kableExtra
• adding vertical line to ggplot bar plot
• change dimensions of shiny app embedded in r markdown HTML
• Preserving many columns when using gather
• Adding missing date values in a data frame with multiple observation periods
• Converting Date/Time stamp into correct R Format using chron()
• Double box plots in ggplot2
• Plotting rectangles in ggplot2 - Invalid input: time_trans works with objects of class POSIXct only

B. Davis answers