cannot create an fts object

[rhameysayed]

I have count data for 6 categories of a multivariate time series. I have tried the following two methods fts() and as.fts()

I have an xts object with the 6 columns of count data and dates

index(count.xts[1])

"2009-01-01"
dim(count.xts)
730 6
dts = format(seq(from=index(count.xts[1]),length.out=dim(count.xts)[1],by="days"),"%Y-%m-%d")

# countData is the original data frame with the dates and count data

count.fts1 = fts(index=as.Date(dts), data=as.matrix(countData))

count.fts2 = as.fts(data.frame(asofdate=dts,as.matrix(countData)))

When input either data object into ftsm() or plot() I get the following error:

Error in 1:ncol(y$y) : argument of length 0

I ran the following diagnostics:

class(count.fts2)
[1] "fts" "zoo"

is.fts(count.fts2)
[1] FALSE

That doesn't really make any sense does it? It's a member of class fts but is NOT an fts object.

Just for good measure I did the following:

class(fts(index=as.Date(rownames(countData)),data=as.matrix(countData)))
[1] "fts" "zoo"

is.fts(fts(index=as.Date(rownames(new.count)),data=as.matrix(new.count)))
[1] FALSE

What gives?

[armstrtw]

in what package is 'is.fts' defined? Is it a function in the zoo package, or perhaps in xts? It probably needs to be updated.

'is.fts' is not a function in the fts package...

warmstrong@krypton:/dvl/R.packages/core.stuff/fts/R$ pwd
/home/warmstrong/dvl/R.packages/core.stuff/fts/R
warmstrong@krypton:/dvl/R.packages/core.stuff/fts/R$ grep 'is.fts' *
warmstrong@krypton:~/dvl/R.packages/core.stuff/fts/R$

[rhameysayed]

My apologies, as.fts is a function in the ftsa package. I have asked the developer for assistance. Thank you for your help.

[armstrtw]

well, I do have as.fts, but not is.fts

as.fts
function (x)
{
UseMethod("as.fts")
}
<environment: namespace:fts>
as.fts.matrix
Error: object 'as.fts.matrix' not found
as.fts.data.frame
function (x)
{
cnames <- colnames(x)
ans <- fts(index = x[, "asofdate"], data = as.matrix(x[,
-match("asofdate", cnames)]))
colnames(ans) <- cnames[-1]
ans
}
<environment: namespace:fts>