R help - Aug 2016 - Unexpected behavior with cbind.ts

I got two ts variables (w and y) that I want to cbind into a mts matrix
variable.

w is a simple ts object with some random data, length=40, start = 2005, end
= 2014.75, frequency = 4, class = "ts".

y is a collection of 2 ts, nrow = 40, ncol=2, start = 2005, end = 2014.75,
frequency = 4, class = "mts", "ts", "matrix"

I was expecting that the result of cbind(w,y) to be a mts matrix with 3
columns, 40 rows, same start and frequency as the originals, and finally to
be of class "mts", "ts", "matrix.

What I get is a single ts variable with length = 120, start = 2005 but end
= 2034,75, frequency = 4, class = "ts". This behavior is what i would
expect from ts.union, but not from cbind.

I, unsuccessfully,  tried to replicated this result with different
variables. For example, cbind(ts(c(0,1), ts(matrix(c(2,3,4,5), 2,2))),
returns exactly what I was expecting a ts matrix, with 2 rows and 3 columns.

Anyone has any idea of what is happening? What kind of attribute my
variables could have to imply this behavior? I have the felling that I am
simply calling two different function, but don't know why.

Thank you in advance

	[[alternative HTML version deleted]]

It would help if you showed us the code you have been using so far plus some
sample data (use dput() to produce it) can really help.

See
ttp://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

http://adv-r.had.co.nz/Reproducibility.html


John Kane
Kingston ON Canada

> -----Original Message-----
> From: apoema.asa at gmail.com
> Sent: Wed, 10 Aug 2016 14:54:38 -0300
> To: r-help at r-project.org
> Subject: [R] Unexpected behavior with cbind.ts
> 
> I got two ts variables (w and y) that I want to cbind into a mts matrix
> variable.
> 
> w is a simple ts object with some random data, length=40, start = 2005,
> end
> = 2014.75, frequency = 4, class = "ts".
> 
> y is a collection of 2 ts, nrow = 40, ncol=2, start = 2005, end >
2014.75,
> frequency = 4, class = "mts", "ts", "matrix"
> 
> I was expecting that the result of cbind(w,y) to be a mts matrix with 3
> columns, 40 rows, same start and frequency as the originals, and finally
> to
> be of class "mts", "ts", "matrix.
> 
> What I get is a single ts variable with length = 120, start = 2005 but
> end
> = 2034,75, frequency = 4, class = "ts". This behavior is what i
would
> expect from ts.union, but not from cbind.
> 
> I, unsuccessfully,  tried to replicated this result with different
> variables. For example, cbind(ts(c(0,1), ts(matrix(c(2,3,4,5), 2,2))),
> returns exactly what I was expecting a ts matrix, with 2 rows and 3
> columns.
> 
> Anyone has any idea of what is happening? What kind of attribute my
> variables could have to imply this behavior? I have the felling that I am
> simply calling two different function, but don't know why.
> 
> Thank you in advance
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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