Given the following snippet....
 m.nf.xts <- xts(rep(0, length(index(m.xts))), order.by=index(m.xts))

Does R know to cache the index(m.xts) or is it more efficient to say...

m.i <- index(m.xts)
 m.nf.xts <- xts(rep(0, length(m.i)), order.by=index(m.i))

?

cheers
Worik

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