This is a very welcome new command. For those
interested, there is some overlap in functionality
with -regplot- on SSC. The main differences are that
1 -regplot- is a post-estimation graphing command intended
to work when fitted response is a smooth function of
whatever is on the x axis (by default, the first-named
predictor). -reg- does _not_ denote limitation
to -regress-.
2 as Michael emphasises -twoway estfit- is a -twoway-
type and meshes with other -twoway- commands. That's
a very important feature. -regplot- is stand-alone at
present but I'll pester the author to add a -plot()-
option.
Nick
[email protected]
Michael Blasnik
> I would like to tell Statalist that a new graphic command that I've
> "written" has been posted to SSC (thanks to Kit Baum). The new graph
> command is -twoway estfit- as in :
>
> graph twoway estfit y x , .....
>
> -twoway estfit- plots the fitted values from any estimation
> command (well,
> any command that works with -predict- and just needs an x/y
> pair). It is
> simply a modified version of -twoway lfit-, which uses
> -regress- only, and
> other similar fitted value plot commands such qfit, fpfit, etc..
>
> -twoway estfit- has an option -estcmd(estimation command
> name)- which lets
> you tell it what estimation command to use. For example, you
> can specify
> using -rreg- or -qreg- to get more robust linear fits than
> -lfit- might
> provide, or even use it with -logit- or -probit- to show the fitted
> relationships. Although you can get the same effect by
> just running your estimation command, running predict and
> then making a line
> graph of the fitted values, by making it a full twoway graph
> type you get
> access to the power of all of Stata's twoway options, by() is
> especially
> useful. I find myself using this graph type frequently.
>
> This was my first foray into .class programming and all the
> new graphics
> stuff in Stata, but it wasn't too hard since I basically
> lifted everything
> from -lfit-. I haven't yet tackled -estfitci-, but that
> should be doable
> too if there's interest.
>
> You can find it by -ssc describe t- where twoway_estfit will
> be listed.
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