[R] overlay plot question

David Freedman 3.14david at gmail.com
Thu Feb 5 02:36:54 CET 2009


You could change the second 'plot' to 'points'

David Freedman

David Kaplan-2 wrote:
> 
> Greetings all,
> 
> I have two logistic plots coming from two calls to plogis.  The code is
> 
> .x <- seq(-7.6, 7.6, length=100)
>   plot(.x, plogis(.x, location=0, scale=1), xlab="x", ylab="Density",
>  main="Logistic Distribution: location = 0, scale = 1", type="l")
>   abline(h=0, col="gray")
>  
> 
> .y <- seq(-7.6, 7.6, length=100)
>   plot(.x, plogis(.x, location=2, scale=4), xlab="x", ylab="Density",
>   main="Logistic Distribution: location = 2, scale = 4", type="l")
>  abline(h=0, col="gray")
>  
>  remove(.x)
> 
>  remove(.y)
> 
> 
> I would like to overlay these on one plot.  Notice here the y-axis is 
> different.  But I would like to axis to be 0 to 1 as in the first plot.
> 
> Any suggestions would be greatly appreciated.
> 
> Thanks in advance,
> 
> David
> 
> 
> -- 
> =======================================================================
> David Kaplan, Ph.D.
> Professor
> Department of Educational Psychology
> University of Wisconsin - Madison
> Educational Sciences, Room, 1061
> 1025 W. Johnson Street
> Madison, WI 53706
> 
> email: dkaplan at education.wisc.edu
> homepage:
> http://www.education.wisc.edu/edpsych/default.aspx?content=kaplan.html
> Phone: 608-262-0836
> 
> ______________________________________________
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> 
> 

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