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st: new graphing command -twoway estfit- available on SSC
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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