[R] Fraction ECDF

[livia]

Thank you very much.


Duncan Murdoch-2 wrote:
> 
> On 7/10/2007 10:36 AM, livia wrote:
>> Hi all,
>> 
>> I would like to plot part of the emperical CDF. Suppose the variable is
>> x, I
>> just need the part when x>1,therefore, I am using the following codes. 
>> 
>> tail <- x>1
>> plot(ecdf(x[tail]), do.points=FALSE, verticals=TRUE)
>> 
>> The "x" value starts from 1, but the yaxs still begins from 0, not the
>> corresponding value when "x" is 1. How can I make it match?
>> 
>> Could anyone give me some advice? Many thanks.
> 
> Rather than subsetting the x, I'd just use xlim and ylim arguments to 
> plot() to change the range.  For example,
> 
> plot(ecdf(x), do.points=FALSE, verticals=TRUE, xlim=c(1, max(x)), 
> ylim=c(1-sum(x>1)/length(x), 1))
> 
> Duncan Murdoch
> 
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