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RE: st: mlowess- Rescaling the Y-axis


From   "Vahid Ravaghi, Dr" <vahid.ravaghi@mcgill.ca>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: mlowess- Rescaling the Y-axis
Date   Fri, 14 Sep 2012 18:23:19 +0000

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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