Hi.

I have a data set where I look at number of events before and after a certain time-point. I want to show this in a before and after graph with different colors for each group. I came a long way using twoway pccapsym. However, many of the observations have the same number of events before and after and therefore lines are overlaping. I am looking for a way to visualize how many observations that are overlapping. I thought I might use frequency weight. But I can not figure out how to use it in a graph made by twoway pccapsym.
In this context, I can't figure out how to make variables that contains the weight information for before and after and add that information to a graph where markers (dots) and/or lines are weighted according to frequency

Small example of data set:
id Group before after
1 2 0 2
2 1 3 1
3 3 2 2
4 2 2 2
5 3 1 3
6 1 1 3
7 1 3 3
In the picture you can see how my graph (w. all data) looks without frequency weight. An example of the code for the graph is:

gen byte one = 1
gen byte two = 2
twoway (pccapsym before one after two if group == 1) (pccapsym before one after two if group == 2) (pccapsym before one after two if group == 3)



Array
I hope you can help me?

Thanx