Hi,
I have problem ploting twoway graph
i have data set hospital id and year
each hospital id repeated dependent of the surgory did in that hospital
my data look like this
id year
1 1991
1 1991
1 1992
1 1992
2 1998
2 1998
2 1998
i want to plot x axis is year , y axis is number of case each year by
hospital
|
| .
No |. . .
cases | *
|* * *
------------------------------------------
1991 1992 1992
. & * are hospital id
No cases: count the hospital id by year
Thanks very much for any comments.
kind Regards
Jey
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