[R] rownames in an apply function

[santosh]

Thanks David. Is there a way of explicitly passing the rowname since I
need it in the function.

On Apr 19, 4:19 pm, David Winsemius <dwinsem... at comcast.net> wrote:
> On Apr 19, 2011, at 6:59 AM, santosh wrote:
>
>
>
>
>
>
>
>
>
>
>
> > Dear Group,
>
> > I am doing an apply function on a zoo object. I need the rownames to
> > be passed to the function.
> > Any suggestions on how to accomplish this?
>
> > Here is the code I am using
>
> > tmp <-
> > structure(c(611.55, 611.55, 611.55, 611.55, 611.55, 520, 520,
> > 520, 520, 520, 425, 425, 425, 432.2, 432.2, 337, 338, 328.95,
> > 328.95, 328.95, 243.8, 242.775, 238.5, 239, 235.925, 161.7, 156.625,
> > 152.825, 151.95, 151.9, 1.5, 1.5, 1.5, 1.5, 1.5, 2, 2.15, 2.15,
> > 2, 2, 3, 2.95, 3.175, 3.2, 3.15, 6, 6.15, 6.525, 6.6, 6.6, 14.5,
> > 14.5, 15.15, 15.45, 15.3, 32.05, 32.05, 33.09, 33.8, 33.23), .Dim =
> > c(5L,
> > 12L), .Dimnames = list(c("2011-04-19 09:24:30", "2011-04-19
> > 09:25:00",
> > "2011-04-19 09:25:30", "2011-04-19 09:26:00", "2011-04-19 09:26:30"
> > ), c("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L"
> > )), index = structure(c(1303185270begin_of_the_skype_highlighting            1303185270      end_of_the_skype_highlighting,1303185300begin_of_the_skype_highlighting            1303185300      end_of_the_skype_highlighting,1303185330begin_of_the_skype_highlighting            1303185330      end_of_the_skype_highlighting,
> >1303185360begin_of_the_skype_highlighting            1303185360      end_of_the_skype_highlighting,
> >1303185390begin_of_the_skype_highlighting            1303185390      end_of_the_skype_highlighting), class = c("POSIXt", "POSIXct"), tzone = ""), class =
> > "zoo")
>
> >> tmp
> >                      A   B   C   D   E   F   G    H    I    J    K
> > L
> > 2011-04-19 09:24:30 612 520 425 337 244 162 1.5 2.00 3.00 6.00 14.5
> > 32.0
>
> snipped
>
> >> apply(tmp,1,function(x)(print (rownames(x))))
> > NULL
> > NULL
> snipped
> >> #How can I get the rownames here instead?
>
>  > rownames(tmp)
> [1] "2011-04-19 09:24:30" "2011-04-19 09:25:00"
> [3] "2011-04-19 09:25:30" "2011-04-19 09:26:00"
> [5] "2011-04-19 09:26:30"
>
> (apply() removes the rownames before passing rows on to functions, ...  
> since they are no longer rows but rather vectors at that point.)
>
> --
> David Winsemius, MD
> West Hartford, CT
>
> ______________________________________________
> R-h... at r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.