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RE: st: graphing question


From   "Newson, Roger B" <r.newson@imperial.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: graphing question
Date   Wed, 5 Apr 2006 21:33:35 +0100

A possible tool for confidence interval plots is -eclplot-, downloadable
from SSC using the -ssc- command. This has a -plot()- option, allowing
users to label their confidence intervals with significance stars if
they wish to. As in:

gene stars=""
replace stars=stars+"*" if p<=0.05
replace stars=stars+"*" if p<=0.01
replace stars=stars+"*" if p<=0.001
eclplot estimate min95 max95 time, plot(scatter max95 time, msym(none)
mlab(stars))

Another tool, for plotting P-values, is -smileplot-, also downloadable
from SSC. In Stata, type -findit eclplot- and -findit smileplot- to find
more about these packages.

I hope this helps.

Roger


Roger Newson
Lecturer in Medical Statistics
POSTAL ADDRESS:
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute at Imperial College London
St Mary's Campus
Norfolk Place
London W2 1PG
STREET ADDRESS:
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute at Imperial College London
47 Praed Street
Paddington
London W1 1NR
TELEPHONE: (+44) 020 7594 0939
FAX: (+44) 020 7594 0942
EMAIL: r.newson@imperial.ac.uk
WEBSITE: http://www.imperial.ac.uk/nhli/r.newson/
Opinions expressed are those of the author, not of the institution.


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Winter
Sent: 05 April 2006 21:27
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: graphing question

It is not clear how your dataset is actually set up.  But assume you 
get it to a form with three variables, time, perce, and sig, with sig 
coded as 1 for "significant" and 0 for not significant.  Then you 
could do something like:

graph twoway (scatter perc time if sig==0, msym(oh))
         (scatter perc time if sig==1, msym(O))
         , legend(order(1 "Not Significant" 2 "Significant")) yline(0)

Even more informative would be to plot the confidence interval for 
each as a vertical range plot, and let users judge for themselves...

--NIck Winter


At 04:06 PM 4/5/2006, you wrote:
>Hi all,
>
>Say I have a table which looks like this the *** shows the values which
are
>significant. Of course I can plot the percentages against time. Is
there
>someway to highlight the significant values in the graph...Say for
example
>by changing the size of the symbols only for the significant values.
>
>Time    percentage
>
>-80     -0.02%
>-70     -0.01%
>-60     -0.04%
>-50     -0.05%
>-40     -0.05%
>-30     -0.07%***
>-20     -0.07%***
>-10     -0.16%***
>-5      -0.19%***
>-3      -0.17%***
>-2      -0.21%***
>-1      -0.27%***
>  0      0.09%***
>  1      0.22%***
>  2      0.09%***
>  3      0.08%***
>  5      0.05%***
>  10     0.04%
>  20     0.02%
>  30     -0.01%
>  40   -0.03%
>  50     0.02%
>
>rajesh
>
>*
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________________________________________________________
Nicholas J. G. Winter                     607.255.8819 t
Assistant Professor                       607.255.4530 f
Department of Government              nw53@cornell.edu e
Cornell University        falcon.arts.cornell.edu/nw53 w
308 White Hall
Ithaca, NY 14853-4601 


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