Actually in looking at this I need it to only add if a 0 occurs instead of
a 1.
On Mon, Mar 5, 2012 at 12:57 PM, jim holtman <jholt...@gmail.com> wrote:
> cumsum
>
> is probably what you want:
>
> > x <- c(1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 0L, 1L, 1L, 1L, 1L,
> + 1L, 0L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L,
> + 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 1L,
> + 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L,
> + 1L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 1L,
> + 0L, 1L, 1L, 1L, 0L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L,
> + 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L,
> + 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L)
> > cbind(x, cumsum(x))
> x
> [1,] 1 1
> [2,] 1 2
> [3,] 0 2
> [4,] 1 3
> [5,] 1 4
> [6,] 1 5
> [7,] 1 6
> [8,] 1 7
> [9,] 0 7
> [10,] 1 8
> [11,] 0 8
> [12,] 1 9
> [13,] 1 10
> [14,] 1 11
> [15,] 1 12
> [16,] 1 13
> [17,] 0 13
>
>
> On Mon, Mar 5, 2012 at 1:51 PM, Edward Patzelt <patze...@umn.edu> wrote:
> > I'm am trying to create a vector that has a running total that adds each
> > time a 1 occurs. here's the code and data
> >
> > c(1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 0L, 1L, 1L, 1L, 1L,
> > 1L, 0L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L,
> > 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 1L,
> > 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L,
> > 1L, 1L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L, 1L,
> > 0L, 1L, 1L, 1L, 0L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L,
> > 1L, 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L, 1L,
> > 0L, 1L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 0L, 1L, 1L, 1L, 1L)
> >
> >
> > total <- {};
> >
> > for(i in 1:length(dat$Valid)){
> > total[i] <- ifelse(dat$Valid[i-1]==1, total[i] + 1, total[i])
> > }
> >
> >
> > Cheers,
> >
> >
> >
> > --
> > Edward H. Patzelt
> > Research Assistant TRiCAM Lab
> > University of Minnesota Psychology/Psychiatry
> > VA Medical Center
> > S355 Elliot Hall: 612-626-0072
> > www.psych.umn.edu/research/tricam
> >
> > [[alternative HTML version deleted]]
> >
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
>
> --
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
> Tell me what you want to do, not how you want to do it.
>
--
Edward H. Patzelt
Research Assistant TRiCAM Lab
University of Minnesota Psychology/Psychiatry
VA Medical Center
S355 Elliot Hall: 612-626-0072
www.psych.umn.edu/research/tricam
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