lgby: lgby
In fiksdala/fiksdal:

This function quickly executes the aggregate and ggplot functions to produce a simple line graph with separate lines based on an indicated group.

1 2	lgby(df, x, y, by, facet_var, grid_var, error_bars = TRUE, dodge = 1, error_bar_width = 1)

`df`	A dataframe.
`x`	The variable to appear on the x-axis.
`y`	The variable to appear on the y-axis.
`by`	The grouping variable.
`facet_var`	The facet-grouping variable.
`grid_var`	The grid-grouping variable. When using grid_var, it is essentially interchangable with facet_var, as together they determine the order and axis of the grid. grid_var cannot be used independently of facet_var for obvious reasons.
`error_bars`	Include standard error bars?
`error_bar_width`	Error bar width