[R] ecdf plots, lines, and y values

Monica Palaseanu-Lovejoy monica.palaseanu-lovejoy at stud.man.ac.uk
Thu Jun 3 19:39:41 CEST 2004


I have a question for the group, perhaps someone can help me 
figure this out.  I've already looked in the help files and they were 
no help to me.  

I have a vector of values and I am plotting an ecdf graph. 

1. How can i draw a continuous line through the ecdf points? (lines 
and type for the plot with an ecdf object does not work)

2. Supposing I have this line drawn. I can add a vertical line of a 
known x value which intersects the graph. How can I determine the 
y value of the graph point that is intersected by the abline? 

Any help would be appreciated.

    Thanks in advance,

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