[R] List of lists

[mohan.radhakrishnan at polarisft.com]

Hi,

The solution that works now is

		closeAllConnections()

But even if I replace the 'list' with the 'array' I get a similar error.

"Exception is  Error in UseMethod(\"close\"): no applicable method for
'close' applied to an object of class \"c('double', 'numeric')\"\n"

#Write each CPU's utilization data into a
#separate file
filelist.array <- function(n){
  cpufile <- list()
  cpufiledescriptors <- array(n,dim=c(0,n))
  length(cpufile) <- n
  for (i in 1:n) {
    cpufile[[i]] <- paste("output", i, ".txt", sep = "")
	cpufiledescriptors[i]<-file( cpufile[[i]], "a" )
  }
    listoffiles <- list(cpufile=cpufile,
cpufiledescriptors=cpufiledescriptors)
	return (listoffiles)
}

Thanks,
Mohan


                                                                            
                                                                            
                                                                            
   Re: [R] List of lists                                                    
                                                                            
                                                                            
   Jim Lemon                                                                
              to:                                                           
                 mohan.radhakrishnan                                        
                                                           31-07-2013 05:19 
                                                                         PM 
                                                                            
                                                                            





On 07/31/2013 04:18 PM, mohan.radhakrishnan at polarisft.com wrote:
> Hi Jim,
>
>      close(filedescriptors$cpufiledescriptors[[1]])
>      close(filedescriptors$cpufiledescriptors[[2]])
>      close(filedescriptors$cpufiledescriptors[[3]])
>
>    I might be doing something wrong. Error is
>
>     Error in UseMethod("close") :
>    no applicable method for 'close' applied to an object of class "c
> ('integer', 'numeric')"
>
Hi Mohan,
I just ran the code within your function "filelist.array" and then was
able to close the connections I had created. I entered your function in R:

filelist.array<- function(n){
     cpufile<- list()
     cpufiledescriptors<- list()
     length(cpufile)<- n
     for (i in 1:n) {
       cpufile[[i]]<- paste("output", i, ".txt", sep = "")
  		 		  cpufiledescriptors[[i]]<-file( cpufile[[i]],
"a" )
     }
       listoffiles<- list(cpufile=cpufile,
  cpufiledescriptors=cpufiledescriptors)
  		 		  return (listoffiles)
}

and then:

filedescriptors<-filelist.array(3)
close(filedescriptors$cpufiledescriptors[[1]])
close(filedescriptors$cpufiledescriptors[[2]])
close(filedescriptors$cpufiledescriptors[[3]])

and it worked fine. Perhaps a typo in your code somewhere?

Jim




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