[R] How can I declare an empty zoo object?

[jpm miao]

Hi,

   I let xzoo be an empty  object:

> xzoo<-{}


   and I have an existing zoo object x1zoo_f. I would like to combine
the two to make a new zoo object, and continue doing so in a loop,
which is not shown here. However, when I type


> xzoo<-cbind(xzoo, x1zoo_f)


   An error message emerges


Error in zoo(structure(x, dim = dim(x)), index(x), ...) :
  “x” : attempt to define invalid zoo object


   Is there any way to define an empty zoo object?


  Thanks,


Miao

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