Is this what you're going for?
factor(values, levels=mylevels[[1]], labels=mylevels[[2]])
[1] a b e e j
Levels: a b c d e f g h i j
On 2014-03-28 16:38, Jonathan Greenberg wrote:
R-helpers:
Hopefully this is an easy one. Given a lookup table:
mylevels <- data.frame(ID=1:10,code=letters[1:10])
And a set of values (note these do not completely cover the mylevels
range):
values <- c(1,2,5,5,10)
How do I convert values to a factor object, using the mylevels to
define the correct levels (ID matches the values), and code is the
label?
--j
--
Jonathan A. Greenberg, PhD
Assistant Professor
Global Environmental Analysis and Remote Sensing (GEARS) Laboratory
Department of Geography and Geographic Information Science
University of Illinois at Urbana-Champaign
259 Computing Applications Building, MC-150
605 East Springfield Avenue
Champaign, IL 61820-6371
Phone: 217-300-1924
http://www.geog.illinois.edu/~jgrn/
AIM: jgrn307, MSN: jgrn...@hotmail.com, Gchat: jgrn307, Skype: jgrn3007
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and provide commented, minimal, self-contained, reproducible code.
