[R] sequentially aggregating elements of a vector

[Rui Barradas]

Hello,

Try ?cumsum

cumsum(1:4)
[1]  1  3  6 10


Hope this helps,

Rui Barradas

Em 14-10-2013 19:49, Martin Batholdy escreveu:
> Hi,
>
> for labelling the stacked bars in a barplot, I need to sequentially sum up the elements of a vector.
>
>
> Suppose I have;
>
> x <- c(1,2,3,4)
>
> (which correspond to the bar-width of stacked bars)
>
> I need;
>
> y <- c(1,3,6,11)
>
>
> (which corresponds to the upper y-values for each bar).
>
>
>
>
> What is the easiest way in R to get from x to y?
> (Or more general; to add labels inside the bars in a stacked barplot)
>
>
>
> thanks!
>
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