I understand Josh's example:
mat <- matrix(1:10, dimnames = list(NULL, "A"))
cbind(X = 11:20, Y = mat + 1)
cbind(X = 11:20, Y = mat[, "A"] + 1)
In the line, cbind(X = 11:20, Y = mat + 1), it would be nice if an error or
warning message were issued to the effect that the "Y = " part is ignored or
not applicable or something to that effect.
I still don't understand why cbind.xts doesn't do what I expect. If I try
what Josh suggests on my xts example, the result is still confusing.
> cbind.xts(close, A = close[,"close"])
close close.1
2007-01-03 1416.60 1416.60
2007-01-04 1418.34 1418.34
2007-01-05 1409.71 1409.71
2007-01-08 1412.84 1412.84
2007-01-09 1412.11 1412.11
If this helps:
*
*
*
> dput(close)
*
*
structure(c(1416.6, 1418.34, 1409.71, 1412.84, 1412.11), .indexCLASS =
"Date", .indexTZ = structure("", .Names = "TZ"), src = "yahoo",
updated = structure(1304875186.625, class = c("POSIXct",
*
*
"POSIXt")), class = c("xts", "zoo"), index = structure(c(1167811200,
*
*
1167897600, 1167984000, 1168243200, 1168329600), tzone = structure("",
.Names = "TZ"), tclass = "Date"), .Dim = c(5L,
*
*
1L), .Dimnames = list(NULL, "close"))
*
*
*
I was also unable to convert Josh's matrix example to xts.
> as.xts(mat, order.by = rownames())
Error in dimnames(x) : 'x' is missing
*
*
*The order.by parameter is required, but I don't understand the error
message and haven't been able to figure out how to fix it. If this helps:*
*
*
*
> dput(mat)structure(1:10, .Dim = c(10L, 1L), .Dimnames = list(NULL, "A"))
*
*
*
*This suggests that mat already has defined dimnames. So why does as.xts
give an error message about dimnames? I was unable to figure out the
problem by looking at any of the help files. In particular the help file
for **as.xts.methods didn't seem to offer any clarifications--at least none
that I could understand.*
*
*
*
*
*-- Russ *
On Sun, May 8, 2011 at 12:26 PM, Joshua Wiley <jwiley.ps...@gmail.com>wrote:
> class(mat)
> class(mat[, "A"])
>
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
