[R] Generating weekdays only

[Greg Snow]

Here is one way:

> mydays <- seq(as.Date("2010-01-01"), as.Date("2010-02-01"), by="1 day")
> myweekdays <- mydays[ ! weekdays(mydays) %in% c('Saturday','Sunday') ]
> myweekdays
 [1] "2010-01-01" "2010-01-04" "2010-01-05" "2010-01-06" "2010-01-07"
 [6] "2010-01-08" "2010-01-11" "2010-01-12" "2010-01-13" "2010-01-14"
[11] "2010-01-15" "2010-01-18" "2010-01-19" "2010-01-20" "2010-01-21"
[16] "2010-01-22" "2010-01-25" "2010-01-26" "2010-01-27" "2010-01-28"
[21] "2010-01-29" "2010-02-01"

This generates the sequence of days, then throws out the weekends (you could also list the weekdays instead of the weekend days and drop the "!", but I am lazy).

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Ron Michael
> Sent: Monday, October 04, 2010 12:08 PM
> To: r-help at r-project.org
> Subject: [R] Generating weekdays only
> 
> Dear all, can anyone please tell me how to generate a sequence of days
> continuously, however without considering weekends i.e. Saturday and
> Sunday? I am aware of following code:
> 
> > seq(as.Date("2010-01-01"), as.Date("2010-02-01"), by="1 day")
>  [1] "2010-01-01" "2010-01-02" "2010-01-03" "2010-01-04" "2010-01-05"
> "2010-01-06" "2010-01-07" "2010-01-08"
>  [9] "2010-01-09" "2010-01-10" "2010-01-11" "2010-01-12" "2010-01-13"
> "2010-01-14" "2010-01-15" "2010-01-16"
> [17] "2010-01-17" "2010-01-18" "2010-01-19" "2010-01-20" "2010-01-21"
> "2010-01-22" "2010-01-23" "2010-01-24"
> [25] "2010-01-25" "2010-01-26" "2010-01-27" "2010-01-28" "2010-01-29"
> "2010-01-30" "2010-01-31" "2010-02-01"
> 
> However this generates all days.
> Thanks for your time.
> 
> 
> 
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