[R] xtable problems with xts objects

[Stergios Marinopoulos]

Hi,  I'm having trouble getting xtable to print a simple xts object.  When the frequency is 1800 I get an error.  However when frequency(x) is reported as 1 it works.  I have included example below.



Another question is how can I have the time index printed in place of the row number?  

Thanks for your help,  
--
Stergios Marinopoulos

library(xts)
library(xtable)

# This does not work.  The indices are 1800 seconds apart.
x = xts(x=rep(pi, 6), order.by=as.POSIXlt( "2014-01-01 06:30:00" ) + 1800 * 0:5 ) 

print(xtable(x))
print(frequency(x))  # [1] 0.0005555556

# This is the error message:
# Error in rep(NA, start(x)[2] - 1) : invalid 'times' argument


# It works when I make the indices only 1 second apart.
x = xts(rep(pi, 6), as.POSIXlt( "1970-01-01 00:00:00" ) + 0:5 ) 
print(xtable(x))
print(frequency(x))  # [1] 1


# Here is a daily data example that works.
library(quantmod)
AAPL = getSymbols("AAPL", auto.assign=FALSE, from="2014-01-01", to="2014-01-10")
print(xtable(AAPL), include.rownames=TRUE)
print(frequency(x))  # [1] 1