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# Re: st: Re: Make xline on top of graph?

 From Paul Burkander To statalist@hsphsun2.harvard.edu Subject Re: st: Re: Make xline on top of graph? Date Fri, 22 Jul 2011 09:00:06 -0400

```Thanks, the scatteri plot worked very well.

I'll have to consider the triangular plots.  I am having a problem in
that where there isn't clumping of bars it's hard to distinguish them.
Perhaps the triangular plot would be more clear, but then it seems
it'll be harder to group by type of observations, unless I do it by
color.

Thanks for the help.

On Thu, Jul 21, 2011 at 2:43 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> Let's suppose you want lines at x = 1000, 2000, 4000. Superimpose on
> top of your -twoway- graph call
>
> || scatteri 0 1000 1 1000 , recast(line) || scatteri 0 2000 1 2000 ,
> recast(line) || scatteri 0 4000 1 4000 , recast(line)
>
> You will want to tweak widths, colours, etc. as well.
>
> In many fields triangular plots (many alternative names exist) are
> used for such data. -triplot- from SSC is a Stata implementation.
>
> An easy alternative is to plot (var2 - var1) versus var3 which
> preserves the information in the three variables. For example, U.S.
> elections can be plotted in terms of
>
> (Republican vote - Democrat vote) vs sum of independent votes
>
> which is not too difficult to think about. Even if the x variable is a
> nonsense dimension, it spreads out the data.
>
> I reviewed some possibilities in this field at the 2008 London users'
> meeting. http://www.stata.com/meeting/uk08/abstracts.html
>
> Nick
>
> On Thu, Jul 21, 2011 at 11:39 AM, Paul Burkander <paul@burkander.com> wrote:
>
>> Here's my situation: I have about 5,000 observations and three key
>> variables, I'll call them var1 var2 and var3.  Each is between 0 and
>> one and the sum of the three variables is one.
>>
>> I'd like to have a graph that's sort of like a stacked bar chart to
>> show the relative proportions of each variable across the 5000
>> observations.  I've succeeded in doing this by using the twoway bar
>> option.  I sort on var1, then graph var1+var2+var3, then var1+var2,
>> then var1.  That part seems to have worked out fine.
>>
>> However, the 5000 observations fall into three distinct categories,
>> and I'd like to first sort by these categories then by var1.  I'd like
>> it to be clear where the demarcation between categories is.  I tried
>> xline, but it seems to be drawn first, so that my bars are drawn over
>> top if it and it can only be seen below 0 and above 1.  I don't see
>> any option to make it be drawn on top.
>>
>> I also tried "graph combine," but there's a large difference in the
>> number of observations in each category, and each of my separate
>> graphs was being drawn with the same width, so the graph was
>
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```