Let's say I have six dots:
x_11, x_12, x_13, x_21, x_22, x_23.
I want to draw lines that connect x_11 with x_12 and x_13
, but not a line between x_12 and x_13
.
After that, I want to do the same thing to x_21, x_22, and x_33
.
That is, I want to connect x_21 with x_22 and x_23,
but not x_22 and x_23
.
I tried the group method (adding the group attribute in aes) but it connects all three dots.
Is there a way to conveniently solve the problem?