Thanks to Maarten for the plug. I'll add a -sysuse auto- line to the next public version of the help for -stripplot-.
On the original question I note that even if one variable is ordinal, applying regression treats it as measured! My mental picture of an otherwise unspecified ordinal variable defaults to a graded variable with about 5 classes. What does a quadratic with such a grade on one side or the other tell you?
Nick
[email protected]
Maarten buis
--- On Mon, 23/11/09, Robin L Jacobowitz wrote:
> I am trying to create a scatterplot showing the
> relationship between two variables, one ordinal and one
> continuous. A regression indicates a quadratic
> relationship, but when I use the twoway scatter syntax,
> I get data points lined up along the categories of the
> ordinal variable.
I like -stripplot- by Nick Cox for these kinds of graphs.
you can download it by typing in stata -ssc install stripplot-.
There are many examples in the help file to play with.
Note that the help file assumes that you recognize the
variable names as comming from the auto.dta dataset that
comes with Stata, and which you can load by typing in
Stata -sysuse auto-.
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