I share the view that this is not best approached
as a question depending on stored estimates. In
addition to -graph bar-, note that the sequence
egen meankcons = mean(kcons), by(age_cat)
label var meankcons "fraction consulting with knee pain"
egen tag = tag(age_cat)
lets you follow with any reasonable graph command
using -meankcons-
as response shown and -if tag- as a way of cutting
down graph size.
Nick
[email protected]
[email protected]
> Rather than using -mean- you could use -graph bar- or -collapse-
> followed by -scatter- to produce a graph of the mean of kcons by age.
>
> For example:
>
> sysuse auto,clear
> graph bar (mean) mpg, over(rep)
>
> preserve
> collapse (mean) mpg , by(rep)
> scatter mpg rep
> restore
Sara Mottram <[email protected]>
> > I have a binary variable kcons which indicates whether or not the
> > person
> > has consulted their doctor about knee pain and another variable
> > age_cat,
> > indicating the age group to which the person belongs.
> > I have calculated the mean of kcons within each level of age_cat
> > using
> > -mean- with the -over()-, option to get the probability of
> > consulting
> > with knee pain in each age group. I have then saved these
> > estimates
> > using -estimates store-.
> > I would now like to produce a scatter plot the proportion of
> > people who
> > consult in each category against age_cat to assess whether there
> > is a trend.
> > This sounds like it should be straightforward but I can't work out
> > from
> > the manuals (I have looked under _estimates in the programming
> > manual)
> > and I can't find anything in the FAQs about how to do this. If I
> > try
> > scatter _est age_cat, I get a flat plot. I could of course produce
> > a
> > plot in Excel by typing in the results of -mean-, but I feel that
> > this
> > is probably an important feature that I should learn to use
> properly?
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
