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From |
Fredrik Wallenberg <[email protected]> |

To |
[email protected] |

Subject |
Re: st: RE: Graphing limitations / questions |

Date |
Mon, 22 Nov 2004 07:52:47 -0800 |

On Fri, 12 Nov 2004 18:22:44 -0000, Nick Cox <[email protected]> wrote: > Fredrik Wallenberg > > > I have a few graphs that I cannot seem to create using Stata 8. > > Perhaps someone could point me in the right direction (or confirm that > > it can't be done ... without creating a new dataset). > > > > I have two multiple choice survey questions. I would like to visualize > > the combinations of the answers in one out of three ways. > > > > A) Use a scatterplot but use the area of each coordinate dot to > > illustrate how many observations there are for that combination. The > > best I've done to date is using matrix and scatter, but that doesn't > > quite do it. > > > > graph matrix q3_3_4 q3_3_3, half jitter(3) msize(tiny) > > > ... I can see how I could do A by creating a variable that had, > > as the weight, the total count for each combination and then us that > > as the aweight. Is there a nicer way? > > As you say you could -- and should -- create a weight. > > bysort q3_3_4 q_3_3 : gen N = _N > egen tag =tag(q_3_3_4 q_3_3) > scatter q_3_4 q_3_3 [w = N] if tag > > > B) Use a 3 dimensional histogram (with the two variables and the x and > > z axis and the join distribution on the y axis). This can easily be > > done in Excel, why not in Stata? > > Why not? Partly because most people who want to do this can do it easily > in Excel, I imagine... But it's clearly a reasonable thing to want. That is a rather bad argument since you can easily to barcharts, scatterplots etc in Excel :-) > > > C) use -histogram, by-, BUT get ONE graph, treating the -by- options > > as separate variables in the same graph. Once again this seems like a > > reasonable thing to do but Stata doesn't have any support for it (that > > I can tell). > > You mean you want them superimposed? yes, similar to a set of bar charts. Once again I guess I could do someting about collapsing the data and actually use bar charts. > > * > * 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/ > * * 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/

**Follow-Ups**:**Re: st: RE: Graphing limitations / questions***From:*"b. water" <[email protected]>

**References**:**st: RE: Graphing limitations / questions***From:*"Nick Cox" <[email protected]>

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