added some explanation on zoo factor vs numeric (as suggested by Ben Bolker)

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@953 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- fix minor typos


git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@954 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
improved subsetting with matrices

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@955 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- avoid errors (zoo:colnames<-, xts:Inf recursion) when NCOL(object)==1


git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@956 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
na.fill fix improvement

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@957 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
added [[.yearmon and [[.yearqtr

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@958 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
added mean() method for zoo objects that essentially does mean(coredata(obj), ...)

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@959 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Constructs like time(obj)[ORDER(time(obj))] are now split up into
two steps in the package code. If zoo is only imported but not
loaded, R can otherwise have problems correctly dispatching to
the new generics ORDER and MATCH.



git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@960 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
fixed as.Date.year* for all-NA vectors

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@961 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
small bug fix in lines.zoo

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@962 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
reduce example code to less than 100 chars per line

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@963 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
updated test output

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@964 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
started preparations for CRAN release of 1.7-10

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@965 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
improved wording for na.rm

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@966 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
transform.zoo now does what transform.data.frame does
(instead of just calling it) in order to get non-standard
evaluation



git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@967 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
added as.list() methods for yearmon/yearqtr

git-svn-id: svn://r-forge.r-project.org/svnroot/zoo/pkg/zoo@968 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Mention rollsums() in the docs, and improve formatting of Usage section