You don't tell us your OS details or provide an actual reproducible
example, but the error suggests that COMMAND is not one of the column
names in your data frame.
Have you checked that? When I run ps on my Fedora system, the column
name is CMD and not COMMAND.
Sarah
On Fri, Aug 16, 2013 at 7:30 AM, <mohan.radhakrish...@polarisft.com> wrote:
> Hi,
>
> When I view this output from the unix command ''ps'' the columns seem to
> properly aligned but it is not read properly into the data frame. The
> aggregate function throws
>
> Error in aggregate.data.frame(data, by = list(COMMAND), FUN = sum) :
> object 'COMMAND' not found
>
> Is there a recomendation to massage this ?
>
> data = read.table("D:\\p..txt",sep="\t")
>
> agg<-aggregate(data,by=list(COMMAND),FUN=sum)
>
> 68 4524 0.0 0.0 12348 872 ? S Aug09 0:00
> hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
> 68 4528 0.0 0.0 12348 860 ? S Aug09 0:00
> hald-addon-keyboard: listening on /dev/input/event1
> 68 4532 0.0 0.0 12348 864 ? S Aug09 0:00
> hald-addon-keyboard: listening on /dev/input/event0
> root 4540 0.0 0.0 10256 704 ? S Aug09 1:02
> hald-addon-storage: polling /dev/sr0
> root 4576 0.0 0.0 8540 492 ? Ss Aug09
> 0:00 /usr/bin/hidd --server
> root 4619 0.0 0.0 122008 1540 ? Ssl Aug09 0:00 automount
> root 4636 0.0 0.0 26348 524 ? Ss Aug09 0:00 ./hpiod
> root 4641 0.0 0.0 154876 6428 ? S Aug09
> 0:00 /usr/bin/python ./hpssd.py
> root 4654 0.0 0.0 63544 1212 ? Ss Aug09
> 0:00 /usr/sbin/sshd
> root 4663 0.0 0.0 134208 2744 ? Ss Aug09 0:00 cupsd
> root 4677 0.0 0.0 21668 896 ? Ss Aug09 0:00 xinetd
> -stayalive -pidfile /var/run/xinetd.pid
> root 4695 0.0 0.0 66968 2324 ? Ss Aug09 0:00 sendmail:
> accepting connections
> smmsp 4703 0.0 0.0 57716 1760 ? Ss Aug09 0:00 sendmail:
> Queue runner@01:00:00 for /var/spool/clientmqueue
> root 4713 0.0 0.0 6480 372 ? Ss Aug09 0:00 gpm
> -m /dev/input/mice -t exps2
>
> Thanks.
>
>
>
--
Sarah Goslee
http://www.functionaldiversity.org
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