-over()- indeed does not apply here; I didn't say otherwise. -stripplot-
with -by()- will produce graphs of the kind you sketch: I don't see what
you think is the difficulty. You would need to specify -vertical-.
Nick
[email protected]
Joseph Wagner
Unfortunately I can't use over with -stripplot- since I can't combine
()over with more than one variable and I have three that I wanted to
compare side by side for each value of the X- axis categorical variable.
by() won't work either for that matter since what I want is basically X
over many Y as follows with a crude representation of my boxplot:
|
| - - - -
| +-+ - +-+ +-+ - +-+
| |-| +-+ |-| |-| +-+ |-|
| +-+ |-| +-+ +-+ |_| +-+
| - +-+ - - +-+ -
| - -
+-------------------------------------------
var_1 var_2 var_3 var_1 var_2 var_3
age=8 age=9
Nick Cox wrote:
> Now my best advice is to use -stripplot- from SSC. Its default is to
> show
> strips of data points, but you can jitter or stack and add boxes or
> bars.
>
> . sysuse auto
> (1978 Automobile Data)
> . stripplot trunk turn mpg, bar
>
> . stripplot trunk turn mpg, bar
>
> . stripplot trunk turn mpg, bar vertical
>
> You can use a -by()- option as well. I'd recommend showing the data,
> but you can blank it out with -ms(none)-.
>
> By default the bars are offset from the data which may answer your
> last question.
>
> Joseph Wagner
>
> I created box plot graph with of 3 X variables over the same Y
variable
> but was then asked to produce a similar graph this time using mean
(not
> median) and +/- 95% CI. I don't think Stata can do this but thanks
to
> a post by Nick three years ago, I was able to (sort of) create these:
>
> egen mean = mean(cont), by(cat)
> egen sd = sd(cont), by(cat)
> gen upper = mean + sd
> gen lower = mean - sd
>
> scatter mean cat || rcap upper lower cat
>
> . . . is the example Nick gave but how would (or could I?) do this
for
> three different X variables (in Nick's example I suppose it would be 3
> different 'cont' variables) on the same graph? I can do
> this for two but not 3 which brings me to my next problem:
>
> The box plots I created earlier were each side by side for the same
> value of X (rather than on top of one another) but the two -rcap-
graphs
> are on top of each other making it impossible to differentiate
> the two lines (three would be even worse). Is there a way to separate
> these lines or do I need to graph these data in another way
altogether?
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