summary_football: The Basic Statistics of Football Team's Performance
In XingfuXu/football: Data Analysis of Football Teams from England

This function returns the basic statistics of football team's performance variables

1	summary_football(data, perfrm_vars, teams, all = FALSE)

`data`	the data set of merged data
`perfrm_vars`	the performance variables
`teams`	the team names of given teams
`all`	If all is true, it will give the summary statistics of all teams. The default value of all is FALSE.

the basic statistics of football team Performance

1 2	# Example get the summary statistics of points, won, and loss of all teams summary_football(data = football.teams, perfrm_vars = c("points", "won", "loss"), all = TRUE)