Here's my data:
Assignment first Stage Grade Type
1 PA06 98.5 final 98.50 PA
2 PA06 98.5 final 98.50 PA
3 PA06 83.0 final 83.00 PA
4 PA06 100.0 final 100.00 PA
5 PA06 100.0 final 100.00 PA
6 PA06 98.5 final 98.50 PA
7 PA06 86.0 final 86.00 PA
8 PA06 100.0 final 100.00 PA
9 PA06 84.5 final 88.00 PA
10 PA06 95.0 final 95.00 PA
11 PA06 83.0 final 90.00 PA
12 PA06 0.0 final 6.75 PA
I am thinking that I want a chart with observations along the x axis, showing a vertical line starting at "first" and ending at "Grade".
Notice that often first and Grade will be equal and in that case I get just a dot. Otherwise I get a line with dots at each end. And I want no labels on the x axis.
This may be a little odd, but I am experimenting with my data. I think it should be "easy" but I can't seem to get it. Here's what I've tried so far:
ggplot(x2, aes(x=first, y=Grade)) + geom_line()
ggplot(x2, aes(x=email)) + geom_point(aes(y=Grade, col="blue")) + geom_point(aes(y=first, col="red"))