[R] 2 functions with same name - what to do to get the one I want

[David Winsemius]

On Jan 26, 2011, at 5:38 AM, pdb wrote:

>
> There seems to be 2 functions call ecdf...
>
> http://lib.stat.cmu.edu/S/Harrell/help/Hmisc/html/ecdf.html

Apparently that used to be its name and that some time in the  
intervening 10 years the name was changed to Ecdf. The Statlib  
repository has rather ancient version of the Hmisc documentation.  
Notice that it gives Harrell's UVa address. You should not use that  
repository for documentation. Use the RSiteSearch:

http://search.r-project.org/cgi-bin/namazu.cgi?query=ecdf&max=100&result=normal&sort=score&idxname=functions

-- 
David.

>
> http://127.0.0.1:11885/library/stats/html/ecdf.html
>
> How do I get the one ecdf {Hmisc} to run instead of the ecdf {stats}
>
> A pointer in the right direction would be greatly appreciated.
>
>
> Tried to instal Hmisc but got this message, so I assume I have it
>
>> utils:::menuInstallPkgs()
> Warning: package 'Hmisc' is in use and will not be installed
>
>
>
> ran the demo from Hmisc with no luck...
>
>> set.seed(1)
>> ch <- rnorm(1000, 200, 40)
>> ecdf(ch, xlab="Serum Cholesterol")
> Error in ecdf(ch, xlab = "Serum Cholesterol") :
>  unused argument(s) (xlab = "Serum Cholesterol")
>
>
> ran the sample code from stats and it worked...
>
>> x <- rnorm(12)
>> Fn <- ecdf(x)
>> Fn     # a *function*
> Empirical CDF
> Call: ecdf(x)
> x[1:12] = -1.9123, -1.6626, -1.2468,  ..., 1.1119,  1.135
>> Fn(x)  # returns the percentiles for x
> [1] 1.00000000 0.91666667 0.33333333 0.66666667 0.58333333 0.16666667
> 0.75000000 0.08333333 0.25000000 0.83333333 0.41666667 0.50000000
>> tt <- seq(-2,2, by = 0.1)
>> 12 * Fn(tt) # Fn is a 'simple' function {with values k/12}
> [1]  0  1  1  1  2  2  2  2  3  3  3  3  4  4  4  5  5  5  6  6  6   
> 7  7  8
> 8  8  8  8  8  9 10 10 12 12 12 12 12 12 12 12 12
>>
>
> -- 
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>
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David Winsemius, MD
West Hartford, CT