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Re: st: adjusted fitted-line/scatter plot after bootstrap with CI

From   Nick Cox <>
Subject   Re: st: adjusted fitted-line/scatter plot after bootstrap with CI
Date   Wed, 30 Nov 2011 08:42:15 +0000

-qfitci- is _not_ for displays after model estimation. I think you are
going to have to do this yourself.
Confidence intervals can be shown using -rarea-.


On Wed, Nov 30, 2011 at 5:34 AM, Juan Dominguez
<> wrote:

> I am fitting a model with a quadratic term (reg DV IV IV^2 COVs) and I
> would like to graph the quadratic relationship after adjustment for
> covariates and bootstrapping with confidence interval envelope much as
> fracplot does after fracpoly.
> I tried cprplot but it won't work with bootstrap and won't add CI. In
> addition, cprplot will draw a straight line rather than a curve
> describing the quadratic relationship. The lowess option does not
> yield a satisfactory curve like fracplot. acprplot will run after
> bootstrapping (as in reg DV IV IV^2 COV, vce(boot, boot_options)), but
> just like cprplot, it won't graph the quadratic curve and won't
> include the CI envelope.
> Is there a way to accomplish this using qfitci?
> Best next thing is predxcon and while it does display a line fitted to
> predicted values it can't be used in combination with bootstrap and it
> won't include the associated scatter plot.
> In a previous posting on this list for a similar query it was
> suggested to manually predict y and se after the adjusted regression,
> and draw the regression line with ci's on top of the scatterplot. I
> know how to predict y and se but I don't know how to draw the
> subsequent (curved) regression line with ci's.
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