R help - Oct 2007 - Multiple calls to a function

Hi y'all,

I wrote two functions; 1) sparsely samples a point pattern and 
calculates the Clark Evans R value and Z score, 2) calls the first 
function multiple times using a for loop and generates a histogram. 
I would like to know if there is a more efficient way of calling the 
first function other than using the for loop.  Any ideas?

cel<-data.frame("R"=0,"RZ"=0,"CV"=0,"PVAL"=0,"INT"=0)
for(i in 1:N) cel[i,]<-cezhpts(dat,np,cv)

Thanks,

Keith Jones

Since you do not change anything in your call to the function, you could
just use the replicate function instead of the for loop (I don't know
that it will speed things up much, but it is a bit more readable).

Hope this helps,

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
 
 
> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Keith Jones
> Sent: Wednesday, October 31, 2007 1:04 PM
> To: r-help at r-project.org
> Subject: [R] Multiple calls to a function
> 
> Hi y'all,
> 
> I wrote two functions; 1) sparsely samples a point pattern 
> and calculates the Clark Evans R value and Z score, 2) calls 
> the first function multiple times using a for loop and 
> generates a histogram. 
> I would like to know if there is a more efficient way of 
> calling the first function other than using the for loop.  Any ideas?
> 
>
cel<-data.frame("R"=0,"RZ"=0,"CV"=0,"PVAL"=0,"INT"=0)
> for(i in 1:N) cel[i,]<-cezhpts(dat,np,cv)
> 
> Thanks,
> 
> Keith Jones
> 
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