[R] 3-dimensional looping Q.

[Uwe Ligges]

Maurice McHugh wrote:
> Hello everyone-
> 
> I have a 3-d array with the 1st dimension being monthly mean data that
> I would like to correlate with some time series index, for example, and 
> save the coefficients in an array.
> 
> The code I am currently running is....
> 
> 
>    rData <- array(0,c(73,144))   # array to store results
>    for (i in 1:73) {
>         for (j in 1:144) {
>               rData[i,j] <- cor(slp[,i,j],y)
>         }
>     }
> 
>     Rather than running this analysis embedded with two outer loops, are =
>     there any more efficient ways of doing this?
>     Many thanks!


Don't know whether it's more efficient:
You can try to apply() the function rcorr() in package "Hmisc" to your 
problem...

Uwe Ligges




>     
> 
> Maurice
> 
> Maurice McHugh
> Department of Geography and Anthropology
> Louisiana State University
> Baton Rouge, LA
> 	[[alternative HTML version deleted]]
> 
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