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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Re: Make xline on top of graph? |

Date |
Fri, 22 Jul 2011 08:33:02 -0500 |

-triplot- (SSC) supports a -by()- option. It is not exactly equivalent to -by()- as a standard -twoway- option but it certainly permits small multiples. -triplot- also allows different point (marker) symbols. Fond though I am of triangular plots, they don't always work well, and alternative scatter plots often work as well as better. I hope to return this topic in a future Speaking Stata column in the Stata Journal. Nick On Fri, Jul 22, 2011 at 8:00 AM, Paul Burkander <paul@burkander.com> wrote: > 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 >>> misleading. >> * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Re: Make xline on top of graph?***From:*Paul Burkander <paul@burkander.com>

**Re: st: Re: Make xline on top of graph?***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: Re: Make xline on top of graph?***From:*Paul Burkander <paul@burkander.com>

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