<>
Well, if you could be bothered to aggregate the two widths of the CIs into
one measure, Stata could plot differently sized ellipses for you based on
it. I know it is a crude method...
************
g diff=cciu- ccil+ yciu- ycil
tw (sc yll cost [aw=diff], msymbol(oh)) (sc yll cost, msize(small))
************
Apart from that, a useful representation of CIs is usually achieved via -ssc
d eclplot-
HTH
Martin
_______________________
----- Original Message -----
From: "Taavi Lai" <[email protected]>
To: <[email protected]>
Sent: Sunday, March 01, 2009 1:27 AM
Subject: st: How to graph point estimate with twoway confidence intervals
Dear statalist,
I have a dataset which contains following variables
- group
- outcome (yll)
- cost (associated with the outcome)
- upper and lower confidence bounds for both outcome and cost
All variables have one observation per group as follows
+--------------------------------------------------+
grp yll ycil yciu cost ccil cciu
--------------------------------------------------
1. 1 838 221 1449 608.7 558 1572.6
2. 2 257 62 408 178 163.2 459.8
3. 3 534 138 908 369.8 339 955.4
4. 4 546 139 908 378.1 346.6 976.8
What I'd like to do is a twoway scatter of outcome versus cost with added
confidence/uncertainty bounds of both outcome and cost for every point in
the scatter in the form of an ellip or circle.
I've had a look on the -ellip- command, but this requires at least three
observations per group for operation and that I don't have unfortunately.
I would very much appreciate all the suggestions on how this type of graph
might be produced.
Best regards,
Taavi
----
Taavi Lai
Public Health Department
University of Tartu
Ravila 19, Tartu 50411
Estonia
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