Description Usage Arguments Details Value Note Author(s) See Also Examples
Get or set dimnames of an xts object.
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x |
an xts object |
value |
a list object of length two. See Details. |
The functions dimnames.xts
and dimnames<-.xts
are
methods for the base functions dimnames
and dimnames<-
.
xts
objects by design are intended for lightweight management
of time-indexed data.
Rownames are redundant in this design, as well as quite burdensome with respect to memory consumption and internal copying costs.
rownames
and colnames
in R make use of dimnames
method
dispatch internally, and thus require only modifications
to dimnames to enforce the xts
no rownames requirement.
To prevent accidental setting of rownames, dimnames<-
for xts
will simply set the rownames to NULL
when invoked, regardless of attempts to set otherwise.
This is done for internal compatibility reasons, as well as to provide consistency in performance regardless of object use.
User level interaction with either dimnames or rownames will
produce a character vector of the index, formatted based
on the current specification of indexFormat
. This
occurs within the call by converting the results
of calling index(x)
to a character string, which itself
first creates the object type specified internally from the
underlying numeric time representation.
A list or character string containing coerced row names and/or actual column names.
Attempts to set rownames on xts objects via rownames or dimnames will silently fail. This is your warning.
All xts
objects have dimension. There are
no xts
objects representable as named or unnamed
vectors.
Jeffrey A. Ryan
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