[R] number of trading days

From: threshold <r.kozarski_at_gmail.com>
Date: Wed, 21 May 2008 04:44:32 -0700 (PDT)

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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