cbind giving NA's?

If you could, dput() them so we can see everything about them. You also
might see if merge() gives you more expected behavior....

Ok...

dput(a)

structure(c(7.6343, 7.6343, 7.5458, 7.4532, 7.404, 7.3317), class = c("xts",
"zoo"), .indexCLASS = "Date", .indexTZ = "", index = structure(c(1270105200,
1270191600, 1270278000, 1270364400, 1270450800, 1270537200), tzone =
"", tclass = "Date"), .Dim = c(6L,
1L), .Dimnames = list(NULL, "ZWD.UGX"))

dput(b)

structure(c(28.02, 28.3, 28.38, 28.21, 28.31, 28.47), .indexCLASS =
"Date", .indexTZ = "", src = "yahoo", updated =
structure(1314356091.21457, class = c("POSIXct",
"POSIXt")), class = c("xts", "zoo"), index = structure(c(1270072800,
1270418400, 1270504800, 1270591200, 1270677600, 1270764000), tzone =
"", tclass = "Date"), .Dim = c(6L,
1L), .Dimnames = list(NULL, "SCHB.Close"))

merge(a,b)
merge(a,b)

ZWD.UGX SCHB.Close
2010-04-01      NA      28.02
2010-04-01  7.6343         NA
2010-04-02  7.6343         NA
2010-04-03  7.5458         NA
2010-04-04  7.4532         NA
2010-04-05      NA      28.30
2010-04-05  7.4040         NA
2010-04-06      NA      28.38
2010-04-06  7.3317         NA
2010-04-07      NA      28.21
2010-04-08      NA      28.31
2010-04-09      NA      28.47

q()

So, no, merge doesn't work...

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