Thank you very much for your replies , but what i don't understand  from jim's  reply  is this command  

dates <- seq(tsp(x)[1]+5/12, tsp(x)[2], .5)

Removing the +5/12 gives me the perfect solution, while keeping it makes the axis run from the second value plotted and the first value from my ts remains without any corresponding value on the axis. What was the role of adding 5/12?

Once again thank you for your replies! 



       
---------------------------------
[[elided Yahoo spam]]
	[[alternative HTML version deleted]]

