[R] Object of type 'closure' not subsettable

[David Winsemius]

On Dec 20, 2009, at 2:40 PM, Muhammad Rahiz wrote:

> Hi all,
>
> How can I overcome the error "object of type 'closure' not  
> subsettable"
>
> I ran the following script
> seq <- paste(seq(1914, 1916, by=1), "*.y", sep=".") # make sequence
> c <- 3 # total number of files
> d2 <- file # creates dummy file
>
> # Input sequence in loop
> for (i in 1:3){
> list <- list.files("~/ukcp09/txt/x.djf", seq[[i]])
> file <- lapply(list, read.table)
>
> # Calculations
> mean <- (Reduce("+", file))/c
> d2[[i]] <- file[[i]] - mean
>
> Apparently, the following command is the source of the error.
>
> d2[[i]] <- file[[i]] - mean
>
> It works OK when I typed into the terminal the following after  
> running the script.
>
> > for (j in 1:3) print (file[[j]]-mean)

Generally R is able to keep straight what is a vector and what is a  
function but you are using quite a few names for vectors and lists  
which should be reserved (at least in your head) for functions. Here  
is a list of function names to avoid as object names:

c
file
list
seq
mean

Why not try being so ambiguous? ObF: Would you call your dog "dog"?


--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT