[R-SIG-Finance] Order a XTS object by value

[Zanella Marco]

Sirs,
a simple question about how I can order an XTS object by time series value (return, in my case). Can I do it only via a previous transformation to a matrix object and consequent ordering with classic order() command?

Many thanks.

Marco

PS: for the record I'm trying to run a time window analysis (es top 10 MAX returns,etc...) of funds time series.