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From |
Roger Harbord <roger.harbord@bristol.ac.uk> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: scatterplot matrix with predicted plots |

Date |
Wed, 26 May 2004 19:58:54 +0100 |

Nick,

Didn't you post code to statalist to do something very similar to this just under a year ago?? I know you post an amazing amount of code to statalist but i'm surprised if you've forgotten...

I have this in my personal ado directory:

. which mygraphmatrix

D:\rogerh\Stata\ado\mygraphmatrix.ado

*! NJC 1.0.0 12 June 2003

*! Posted on Statalist.

*! Matrix plot with lowess smooths and quantile plots on diagonal.

*! It's slow.

Granted it's kind of a brute-force approach - it draws each graph and saves it then -graph combine-s the results, so you get axes around each sub-graph and it isn't as efficient in use of time or space as a low-level extension to -graph matrix- possibly could be. It's still a very nice tool for data exploration though (with a built-in an excuse for a quick tea break).

Garry, if you search the Statalist archives ( http://www.stata.com/statalist/archive/ ) for -mygraphmatrix- you'll find the code. Should be easy enough to adapt to use other fits instead of lowess if desired (might run a little quicker too).

Roger.

--On 26 May 2004 13:29 +0100 Nick Cox <n.j.cox@durham.ac.uk> wrote:

This is a very understandable thing to want. My guess, however, is that it is much more difficult to implement than you would guess. That is, it would be possible to add code at the low level that would let you slap something Y X on top of scatter Y X The difficulty is to do that while also giving you, the user, the kinds of handles that you really want to control the details of the graphs. Thus you might say, "All I want is an lfit Y X on top on each scatter." But if that is done blindly, then not everything is what you really want: for example, the y axis titles would probably be too messy for your taste. So you need a handle that controls that. All this is guesswork, and a signal to StataCorp to say that I am way too pessimistic here. We're in weird territory with the new graphics: some things which might sound very difficult are in fact very easy, and vice versa too. Nick n.j.cox@durham.ac.uk-----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Garry Anderson Sent: 26 May 2004 08:13 To: statalist@hsphsun2.harvard.edu Subject: st: scatterplot matrix with predicted plots Hi, Is it possible please to overlay a predicted plot (linear or quadratic or fractional polynomial etc) for each graph in a scatterplot matrix? There does not appear to be an option in graph matrix x1 x2 x3 x4 y or in the menu for scatterplot matrix Best wishes, Garry

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