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Re: st: RE: overlaying 2 or more ciplot/option nolconfidence?
Thank you for your kindness. Yes, you are right. I have a categorical
variable, say A, with 3 categories, A1, A2, A3. The idea was to plot the
means of the continuous variable haemoglobin over the values 0,1,2,3
..11 months of the numeric/continuous variable age. So, I would have
three curves of haemoglobin in the same plot/graph. In using -ciplot- I
would do it very fast if the command allowed that.
I will try the other ways.
Nick Cox wrote:
I take this as a reference to the user-written
program -ciplot- on SSC.
-ciplot- is best thought of as a wrapper
for -ci-. It has a -by()- option, just
as -ci- does, and the design decision
was to allow several confidence intervals
to be shown in one plot.
That _isn't_ how -twoway ... , by()-
works; in other words, -ciplot- follows
-ci-, not -twoway-, in what -by()- means.
-ciplot- has a -plot()- option, which is
more evident from looking at the code
than from looking at the help,
As the whole point of -ciplot- is to draw
confidence intervals, I am somewhat bemused
by the option suggested. If you want
just to plot means, there are lots of ways
to do that.
Jose Maria Pacheco de Souza, Professor Titular
Departamento de Epidemiologia
Faculdade de Saude Publica/Universidade de Sao Paulo
Av. Dr. Arnaldo, 715 cep 01246-904
Sao Paulo Brasil
fones (11)3082-3886 (11)3714-2403 (11)3768-8612
fax (11)3082-2920 (11)3714-2403
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