Hi Joshua,

Thanks one more time for your valuable input.

Nikos

On Sat, Oct 30, 2010 at 12:37 PM, Joshua Ulrich <josh.m.ulrich@gmail.com>wrote:

> Hi Nikos,
>
> On Sat, Oct 23, 2010 at 4:25 PM, Nikos Rachmanis
> <nikos.rachmanis@gmail.com> wrote:
> > Hi Joshua & Jeff,
> > Thank you very much for your answers. As you said I followed you
> > recommendation with the following code:
> > Close<-as.matrix(close)
> > BB<-format(BBands(Close, n=14, sd=2), digits=6)
> > Joshua, the only thing that I do not comprehend fully is the maType
> argument
> > you have. How exactly do you use it?
>
> The maType argument isn't particularly interesting in BBands because
> BBands only requires one MA.  maType allows you to specify different
> MAs (or the same MA with different arguments) for functions that have
> more than one MA.  ?RSI has some examples:
>
> # Case of one 'maType' for both MAs
> rsiMA1 <- RSI(price, n=14, maType="WMA", wts=ttrc[,"Volume"])
>
> # Case of two different 'maType's for both MAs
> rsiMA2 <- RSI(price, n=14, maType=list(maUp=list(EMA,ratio=1/5),
>              maDown=list(WMA,wts=1:10)))
>
>
> > Thank you very much everyone for the very useful feedback,
> > Nikos
>
> Best,
> --
> Joshua Ulrich  |  FOSS Trading: www.fosstrading.com
>
>
> > On Thu, Oct 21, 2010 at 6:01 PM, Joshua Ulrich <josh.m.ulrich@gmail.com>
> > wrote:
> >>
> >> Hi Nikos,
> >>
> >> On Thu, Oct 21, 2010 at 4:37 PM, Nikos Rachmanis
> >> <nikos.rachmanis@gmail.com> wrote:
> >> > Hi all,
> >> >
> >> > I am new to R and I would appreciate if someone can help me out with
> the
> >> > following problem. I am trying to use the TTR package in order to
> >> > calculate
> >> > the Bollinger Bands. I have created a matrix with the Open, High, Low
> >> > and
> >> > Close variables using the following command:
> >> >
> >> You did not create a matrix, you created a data.frame.  They are
> >> different.  Compare ?data.frame and ?matrix.
> >>
> >> > OHLC<-data.frame(open, high, low, close, check.names=TRUE)
> >> >
> >> > However every time I am trying to run the command ( BBands(OHLC, n=20,
> >> > maType, sd=2, ...)) this is the error I am getting:
> >> >
> >> > "Error in inherits(x, "xts") : object 'x' not found"
> >> >
> >> A reproducible example would help.  Even if you did not get the above
> >> error, your command should fail because the OHLC object has 4 columns
> >> and BBands only accepts objects with 1 or 3 columns (see ?BBands).
> >>
> >> > Has anyone came across this problem in order to know the solution?
> >> >
> >> > Thanks a lot in advance,
> >> > Nikos
> >> >
> >> >        [[alternative HTML version deleted]]
> >> >
> >> > _______________________________________________
> >> > R-SIG-Finance@stat.math.ethz.ch mailing list
> >> > https://stat.ethz.ch/mailman/listinfo/r-sig-finance
> >> > -- Subscriber-posting only. If you want to post, subscribe first.
> >> > -- Also note that this is not the r-help list where general R
> questions
> >> > should go.
> >> >
> >
> >
>

	[[alternative HTML version deleted]]

