Hi all,

I've got object *cumsumtab, *where the first row (1,2,3,4,5,6,8,13,14,17,40)
are names (actually, categories), and the second row has numeric values.

> cumsumtab
 1  2  3  4  5  6  8 13 14 17 40
 2  4  6  7  9 11 13 14 15 16 17

I'm trying to find a way of finding to which category ( in *names(cumsumtab)
* ) belongs a given value (let's say Q1 <- 4.25). So far, I've tried the
following:

> Q1 <- 4.25

>cstQ1 <- cumsumtab-Q1
>cstQ1
    1      2      3      4       5       6      8      13       14
17      40
-2.25 -0.25  1.75  2.75  4.75  6.75  8.75  9.75   10.75  11.75   12.75

> min(cstQ1[cstQ1>0])
[1] 1.75

Then I'm trying to recover the name of the class that 1.75 (the closest
superior number) belongs to. I haven't found a function that actually tells
you the position that the value occupy on the list (so I can slice it or
something).

ANY idea would be of great help. Thanks in advance.

Germán Bonilla
I.Ecol, UNAM

	[[alternative HTML version deleted]]


