[R] merge xts objects with different data types ?

[Jeff Newmiller]

The root of your problems lie in your assumption that xts variables act like data frames. Instead they are matrices with an index attribute. All values in a matrix must be of the same storage mode. 

You might want to investigate the data.table package. It is not a time series object but you can still handle time series operations and you can have any type of data.
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Sent from my phone. Please excuse my brevity.

On September 3, 2015 5:40:36 PM PDT, ce <zadig_1 at excite.com> wrote:
>
>Hello
>
>Let's say some questions about merging  xts variables :
>
>a<- xts("abc", Sys.Date())
>b <- xts("def", Sys.Date())
>c <- xts(1, Sys.Date())
>
>> merge(a,b)
>           a     b    
>2015-09-03 "abc" "def"
>> merge(a,b,c)
>            a  b c
>2015-09-03 NA NA 1
>Warning messages:
>1: In merge.xts(a, b, c) : NAs introduced by coercion
>2: In merge.xts(a, b, c) : NAs introduced by coercion
>3: In merge.xts(a, b, c) : NAs introduced by coercion
>4: In merge.xts(a, b, c) : NAs introduced by coercion
>
>How I can merge  a, b ,c correctly ? Another example is with Binary
>variables :
>
>> e<- xts(TRUE, Sys.Date())
>> e
>           [,1]
>2015-09-03 TRUE
>> merge(e,b)
>           e  b
>2015-09-03 1 NA
>Warning message:
>In merge.xts(e, b) : NAs introduced by coercion
>
>
>My second question is how I can convert an xts object to factor :
>
>> d <- merge(a,b)
>> d
>           a     b    
>2015-09-03 "abc" "def"
>> factor(d, levels = c("abc","def"))
>  a   b 
>abc def 
>Levels: abc def
>
>Date disappears here?
>
>Thanks for your help
>ce
>
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