[R] inconsistency in list subsetting in R in linux

[William Dunlap]

> args(parallel::mclapply)
function (X, FUN, ..., mc.preschedule = TRUE, mc.set.seed = TRUE,
    mc.silent = FALSE, mc.cores = 1L, mc.cleanup = TRUE, mc.allow.recursive
= TRUE)

You gave it 'fun=forecast' instead of 'FUN=forecast'.  Case matters in R.

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Fri, Jun 29, 2018 at 4:19 AM, akshay kulkarni <akshay_e4 using hotmail.com>
wrote:

> dear members,
>                            I am using GNU R(R in linux CLI). I am trying
> to debug a function called "grand.finalelPf". In the function the following
> line appears
>
> > yhpf2 <- mclapply(LYG2[-w], fun = forecast, h = 1)
>
> I execute the above line in browse[2] prompt. I then type the following:
> Browse[2] > length(yhpf2)
>
> It also is getting executed with the following output:
> [1] 464
>
> But when I type this:
> Browse[2] > yhpf2[[3]]
>
> the ouput is this:
>
> [1] "Error in lapply(X = S, FUN = FUN, ...) : \n  argument \"FUN\" is
> missing, with no default\n"
> attr(,"class")
> [1] "try-error"
> attr(,"condition")
> <simpleError in lapply(X = S, FUN = FUN, ...): argument "FUN" is missing,
> with no default>
> Browse[2] >
>
> why is this getting outputted instead of a value? Even if all the yhpf's
> are NULL, the above is output is weird.
>
> What is wrong? Why would the output relate to lapply? If the culprit was
> mclapply, then why does the line get executed without an error message? The
> same function is working perfectly well in windows(I used parLapply instead
> of mclapply).
> Is this peculiar to R on Linux? Please help....
>
> very many thanks for your time and effort,
> Yours sincerely,
> AKSHAY M KULKARNI
>
>
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>
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