[R] Welcome to the "R-help" mailing list

[Ista Zahn]

Hi Bill,
You might be working too hard. Consider:
> weekdays(as.Date('2010-11-30')) == "Monday"
[1] FALSE
> weekdays(as.Date('2010-11-29')) == "Monday"
[1] TRUE
>

HTH,
Ista

On Tue, Nov 30, 2010 at 9:40 PM, Bill Yang <gy631223 at hotmail.com> wrote:
>
> Hi there,
> I am having problem of matching string. what i want is when i type a date such as 2010-11-30, the function will return the day (monday, tuesday, wednesday, thursday, friday or staturday). then i want another function will return true if the return of the day is monday, return false if the return of the day is not monday.
> I already find the weekdays(as.Date('2010-11-30')) function which will tell me exactly what day its gonna be. however, i am having problem of return True or False whether or not the return day has matched.
> please help me out. I appreciate.
> Bill
> P.S the following is the partial codes.if(match(weekdays(as.Date('2010-11-30'), "Monday")==1){print("yes")}
>
>
>
> r-help at r-project.org
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>> Date: Wed, 1 Dec 2010 03:34:01 +0100
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-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org