[R-SIG-Finance] Naming conventions for merged XTS columns

[Worik Stanton]

When I merge two xts with the same column names a '.1' is appended...

Where does this convention come from and can it be firmly relied on?

Sorry if this is a general 'R' question... But merge acts differently
for data.frames

cheers
Worik

> M <- xts(trunc(3*runif(3)), seq(as.Date(1), as.Date(3), by=1))
> M
           [,1]
1970-01-02    0
1970-01-03    2
1970-01-04    1
> colnames(M) <- 'a'
> N <- xts(trunc(3*runif(3)), seq(as.Date(1), as.Date(3), by=1))
> colnames(N) <- 'a'
> merge(N,M)
           a a.1
1970-01-02 2   0
1970-01-03 1   2
1970-01-04 2   1
>

> merge(as.data.frame(M), as.data.frame(N) )
  a
1 1
2 2
3 2
>


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