Ggplot Line Graph Multiple Variables. The easy way is to use the multiplot function defined at the bottom of this page. Basic line graph ggplot data dat aes x time y total_bill group 1 geom_line This would have the same result as above ggplotdatadat aesxtime ytotal_bill geom_lineaesgroup1 Add points ggplot data dat aes x time y total_bill group 1 geom_line geom_point Change color of both line and points Change line type and point.
The easy way is to use the multiplot function defined at the bottom of this page. Ggplottest_data aesdate geom_lineaesy var0 colour var0 geom_lineaesy var1 colour var1. Often the x variable represents time but it may also represent some other continuous quantity like the amount of a drug administered to experimental subjects.
Secaxis does not allow to build an entirely new Y axis.
Next I added my geom_line call to the base ggplot graph in order to create this line. Ggplottg aesx dose y length shape supp geom_line geom_pointsize 4 Make the points a little larger ggplottg aesx dose y length fill supp geom_line geom_pointsize 4 shape 21 Also use a point with a color fill. The ggplot function is more flexible and robust than qplot for building a plot piece by piece. June 20 2019.
