BTW, although I use the mean of the same variable here, there is no
syntax or other reason why you could not use the mean of another
variable. It's just that I started using mpg and there's no other
variable in the auto data which has the same units.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: 18 August 2008 18:34
To: [email protected]
Subject: st: RE: box plot with 2nd variable
I think the answer is No with -graph box-.
With -stripplot- from SSC you can do things like this:
. sysuse auto
(1978 Automobile Data)
. egen mean = mean(mpg), by(rep78)
. sort rep78
. stripplot mpg, over(rep78) vertical stack box addplot(line mean rep78)
. stripplot mpg, over(rep78) vertical stack box addplot(connect mean
rep78)
which sounds similar to what you want. There are several other options:
see the help.
-stripplot- has a built-in tendency to showing all data points, not just
those beyond quartiles +/- 1.5 IQR. It is not designed as a clone of
-graph box-, but it shares some features.
Nick
[email protected]
Cathy L. Antonakos
I am wondering if it is possible to add a connected line to a box plot.
The line would connect points representing the average value of a second
variable for each group.
The syntax I am using without the second variable is:
graph box index, over(id)
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