[R] Why I get this error? Error in close.connection(f) : invalid connection

baptiste auguie baptiste.auguie at googlemail.com
Tue Oct 27 23:37:14 CET 2009


Hi,

>From ?read.csv

"Alternatively, file can be a readable text-mode connection (which
will be opened for reading if necessary, and if so closed (and hence
destroyed) at the end of the function call)"

HTH,

baptiste



2009/10/27 Peng Yu <pengyu.ut at gmail.com>:
> I don't understand why I can not close 'f'. This may be very simple,
> but I don't see why. Could somebody let me know?
>
> $ cat gzfile.csv
> "","V1","V2","V3","V4","V5"
> "1",1,5,9,13,17
> "2",2,6,10,14,18
> "3",3,7,11,15,19
> "4",4,8,12,16,20
> $ Rscript gzfile.R
>> f = file("gzfile.csv")
>> A = read.csv(f)
>> A
>  X V1 V2 V3 V4 V5
> 1 1  1  5  9 13 17
> 2 2  2  6 10 14 18
> 3 3  3  7 11 15 19
> 4 4  4  8 12 16 20
>> close(f)
> Error in close.connection(f) : invalid connection
> Calls: close -> close.connection
> Execution halted
>
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