Message-ID: <aaabc46104035b2b0bc0fd9ee885c100@cofc.edu>
Date: 2005-08-16T17:18:23Z
From: Allan Strand
Subject: recategorizing a vector into discrete states
Hi All,
I'm trying to take a numerical vector and produce a new vector of the
same length where each element in the first is placed into a category
given by a 'breaks-like' vector. The values in the result should equal
the lower bounds of each category as defined in the breaks vector.
I suspect that a vectorized solution is pretty simple, but I can't
seem to figure it out today. Here is an example of my problem:
Vector 'a' is the original vector. Vector 'b' gives the lower bounds
of the categories. Vector 'c' is the result I am seeking.
a <- c(0.9, 11, 1.2, 2.4, 4.0, 5.0, 7.3, 8.1, 3.3, 4.5)
b <- c(0, 2, 4, 6, 8)
c <- c(0, 8, 0, 2, 4, 4, 6, 8, 2, 4)
Any suggestions would be greatly appreciated.
cheers,
Allan Strand