On Aug 19, 2012, at 12:04 PM, White, William Patrick wrote:
On the surface this seems pretty simple, but I flummoxed. I have two
sets of numbers they bounce around zero, positive one and negative
one. They have a relationship between them, where one diverges away
from the other. I want create a second set of numbers that tracks
that divergence.
#Lets make some data like mine, kinda
Firstset <- runif(100, min = -1 , max =1)
Secondset <- runif(100, min = -1 , max =1)
#So something like:
Divergence <- abs (Firstset - Secondset)
#but this doesn't work because when Firstset is at .5 and Secondset
is at -.25 it returns .25 instead of .75
abs( .5 - (-.25) ) should NOT return .25 so you need to produce a
better example or point to specifics in the example you offered. If
what you wanting what you are getting, then use set.seed(123) and
refer to specific values.
> abs( .5 - (-.25) )
[1] 0.75
--
David.
#another possibility is:
Divergence <- abs (Firstset) - abs (Secondset)
#but when Firstset is at .5 and Secondset is at -.5 it returns 0
instead of 1
#It seems like there is a better way to do this. Any ideas?
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David Winsemius, MD
Alameda, CA, USA
______________________________________________
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