R help - May 2008 - number of trading days

Hi, I work on the date format: yyyymmdd. I would like to calculate the number
of (working or trading) days between two of such specified dates in specific
year at US stock exchange OR at least with respect to 252-days year.

What I did so far was the conversion (example):
x<-20060213; y<-20060402 # refering to January 13 and April 2, 2006
x1 <- as.Date(as.character(x), "%Y%m%d")
y1 <- as.Date(as.character(y), "%Y%m%d")
# nuber of calendar days
nr_cal<-diff(rbind(x1,y1))

best regards, robert




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On Wed, May 21, 2008 at 04:44:32AM -0700, threshold
wrote:
> 
> Hi, I work on the date format: yyyymmdd. I would like to calculate the
number
> of (working or trading) days between two of such specified dates in
specific
> year at US stock exchange OR at least with respect to 252-days year.
> 
> What I did so far was the conversion (example):
> x<-20060213; y<-20060402 # refering to January 13 and April 2, 2006
> x1 <- as.Date(as.character(x), "%Y%m%d")
> y1 <- as.Date(as.character(y), "%Y%m%d")
> # nuber of calendar days
> nr_cal<-diff(rbind(x1,y1))
Have a look at the fCalendar package on CRAN.

Dirk

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Three out of two people have difficulties with fractions.