[R] help with xts

[Bert Gunter]

Presumably -z is not defined for an xts class object,z ? (whereas indexing is)

-- Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch




On Sun, May 18, 2014 at 7:25 AM, Pete <freerisk3 at 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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