Re: st: mlowess- Rescaling the Y-axis

[Nick Cox <njcoxstata@gmail.com>]

I don't know why that is surprising; it's exactly what would be  
expected from the documentation for -twoway lowess-. -mlowess- (SSC)  
is a different beast and I think you would need to do what I  
recommended, namely copy and edit the code. I've not tried it myself.

Nick

On 14 Sep 2012, at 19:23, "Vahid Ravaghi, Dr"  
<vahid.ravaghi@mcgill.ca> wrote:

> Thanks for your response Nick. Can you please be more specific? For  
> the lowess, to my surprise, adding 'twoway' to the command (.twoway  
> lowess var1 var2) removed all points, depicted only the smooth  
> curve, and enabled rescaling the y-axis. It does not seem to be  
> working for the mlowess though.
>
> Vahid
>
>
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner- 
> statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
> Sent: 14 September 2012 01:07
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: mlowess- Rescaling the Y-axis
>
> -mlowess- (SSC) is user-written, as you are asked to explain.
>
> To get what you want you would need to clone -mlowess- and remove  
> all the graphics calls except those drawing the predicted values  
> given the predictors.
>
> If they are essentially flat w.r.t. the predictors the modelling or  
> smoothing exercise is evidently finding little structure in the data.
>
> Nick
>
>
> On 13 Sep 2012, at 20:26, "Vahid Ravaghi, Dr"
> <vahid.ravaghi@mcgill.ca> wrote:
>
> > Hi Statalist
> >
> > I am trying to depict the Lowess smoothing with multiple predictors
> > using the command 'mlowess'. Because I only needed the smoothed  
> > curve,
> > I added the 'nopt' option to get rid of the scatterplot. This was the
> > code:
> >
> > .mlowess teeth income, nopt
> >
> > The curve lie below the value 2 of the y-axis, but the y-axis ranges
> > from 0-25. As a result, the curve looks really small and it is hard  
> > to
> > interpret. Changing the range of the y-axis using the' yscale'
> > and 'ylable' is not feasible due to wide range of observations. I was
> > wondering if anyone have any suggestion to enlarge the curve either  
> > by
> > changing the scale of the y-axis  or etc..
> >
> > Kind regards,
> >
> > Vahid Ravaghi
> > Postdoctoral Fellow
> > McGill University
> >
> >
> >
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