[R] How to denote a line on the graph

[David Winsemius]

On Sep 17, 2010, at 7:57 PM, aegea wrote:

>
> Please give me some help, many thanks.
>
> I graphed a expected CDF line of a binomial distribution on a graph,
> And I have some observed points (observed CDF) from 4 groups fall on  
> the
> smooth CDF line.
>
> I cannot really get the legend I want
>
>
> legend ('topleft', c('a, 'b', 'c', 'd', 'expected CDF'),  
> col=c(1,2,3,4),
> pch=c(0,1,2, 3, '' ), lty=c(0,0,0,0,1) )

Does this deliver the sought after "graph notations" and line?

  legend ('topleft', c('a', 'b', 'c', 'd', 'expected CDF'),  
col=c(1,2,3,4),
             pch=c(0,1,2, 3, NA ), lty=c(0,0,0,0,1) )
>
> Ideally, in legend I want to show different graphics marks for  
> different
> group, and a short line in the legend to show the smooth line on the  
> graph
> is the CDF. but, the legend with my code shows 0, 1, 2, 3 instead  
> different
> graph notations for the four groups.
> -- 
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