家用电视机正常工作的电流约为多少A Multi groups line chart with ggplot2 – the R Graph Gallery

If you鈥檙e not familiar with the geom_line() function, you should probably he a look to the most basic line chart first.

Here, the input data frame is composed by 3 columns:

An ordered numeric variable for the X axis Another numeric variable for the Y axis A categorical variable that specify the group of the observation

The idea is to draw one line per group. This is doable by specifying a different color to each group with the color argument of ggplot2.