Parameter Description: Legend Position On Plots
The position of the legend.
By default (NA_integer_) the algorithm tries to find a suitable position.
Choose one of the following values to specify the position manually:
-1: no legend will be shown
NA: the algorithm tries to find a suitable position
0: legend position outside plot
1: legend position left top
2: legend position left center
3: legend position left bottom
4: legend position right top
5: legend position right center
6: legend position right bottom