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From |
David Hoaglin <dchoaglin@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: 2 dimensional graph for joint distribution |

Date |
Wed, 30 Oct 2013 10:54:48 -0400 |

Lulu, That graph in Train's paper is definitely a type of display that one should avoid. Unless you have a fairly large number of combinations of the coefficients of odo and bill, you will have little way to develop the surface corresponding to the joint density function of those coefficients. For numbers of combinations like the six in your example, it might work to use a "bubble plot" --- a scatter plot of the coefficient of bill against the coefficient of odo in which each point is plotted as a circle whose area is proportional to share. I don't know whether such a plot is readily available in Stata. Regards, David Hoaglin On Wed, Oct 30, 2013 at 7:07 AM, Lulu Zeng <luluzengnz@gmail.com> wrote: > Dear Statalist > > I am having trouble creating a two dimensional joint distribution bar > graph in Stata. > > I'm trying to graph the joint distribution of 2 coefficients I > estimated from a nonparametric choice model using fixed mass point > method following Kenneth Train's approach in his 2008 paper (EM > Algorithms for nonparametric estimation of mixing distributions). The > graph I am trying to make is similar to the one on page 65 of Train's > paper: http://elsa.berkeley.edu/~train/EMtrain.pdf > > My 2 coefficients (both discrete) are called odo and bill, and the > variable share gives the distribution of the 2 coefficients (share > adds up to 1), for example: > > odo bill share > 0.25 0.58 0.15 > 0.48 0.93 0.17 > 0.33 0.20 0.09 > 0.76 0.64 0.23 > 0.87 0.28 0.25 > 0.53 0.83 0.11 > > I want to graph the joint distribution of odo and bill with them on > the x axis (2 dimensions), and their joint distribution shown as > percentages on the y axis. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: 2 dimensional graph for joint distribution***From:*Lulu Zeng <luluzengnz@gmail.com>

**References**:**st: 2 dimensional graph for joint distribution***From:*Lulu Zeng <luluzengnz@gmail.com>

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