Thanks to all for your ideas and inspirations
Il 18/05/2014 18.35, Joshua Ulrich ha scritto:
Using subset assignment with an array usually doesn't work well with
xts/zoo objects. Your case wouldn't even work with a matrix because
you have NA in your array.
In this case, you can achieve the same result using multiplication:
pos.neg.1 <- ((cond1 < cond2)*-2+1)
test <- test * pos.neg.1
Best,
--
Joshua Ulrich | about.me/joshuaulrich
FOSS Trading | www.fosstrading.com
On Sun, May 18, 2014 at 9:25 AM, Pete <freeri...@gmail.com> wrote:
I have 3 xts objects: test, cond1, cond2
You can download here:
https://dl.dropboxusercontent.com/u/102669/obj.rar
My problem is very simple.
test [ cond1 < cond2] = NA THIS WORKS
test [ cond1 < cond2] = -test [ cond1 < cond2] THIS DOESN'T WORKS
Why?
My objective is to substitute all values in test (when cond1 < cond2) with
the corresponding values of test but with negative sign
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