Stibu questions

Stibu answers

• gap in the plot area for geom_area
• error in using heatmap() as the plot input of ggsave()
• Is there an R function to change file ownership?
• R how to calculate 'Percentage of Change' between two rows?
• Calculations with minutes and seconds in R
• In R, how does group_by in dplyr work?
• ggplot to display same colors for factor levels [duplicate]
• how insert zeros in seq in R
• Pad (expand) only the top of continuous scale in ggplot2 [duplicate]
• Convert from billion to million and vice versa