'L'' and ''R'' refer to left and right axes. That is, L indicates the data value is plotted on the Y-axis on the left, and R means the value is plotted on the Y-axis on the right.
What do "L" and "R" represent when they appear in the legends?
'L'' and ''R'' refer to left and right axes. That is, L indicates the data value is plotted on the Y-axis on the left, and R means the value is plotted on the Y-axis on the right.