Re: [R-SIG-Finance] Donchian Channel in TTR

2012-04-15 Thread Joshua Ulrich
On Fri, Apr 13, 2012 at 1:04 PM, BBands bba...@gmail.com wrote: Donchian channels are a sort of special case in which the channel values should not include the current period. if I were to code this, today's value would reflect the n-1 prior highs and lows. The reason So if n=10, you would

[R-SIG-Finance] R fArma package

2012-04-15 Thread jefe goode
I am trying some Arma fitting and prediction routines from fArma.   I am finding that the arma generation and fitting functions in this package do not match up. ie When I generate an arma 2,2 model with armaSim() the armaFit() routine gives a very different model fit. Can anyone shed any light