How to find out number of Fridays in a month?

Question

Kevin 2022-8-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1777940-how-to-find-out-number-of-fridays-in-a-month

回答： Cris LaPierre 2022-8-11

I guess I can use lweekdate and nweekdate. Just wondering if there is a faster way to do this.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2022-8-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1777940-how-to-find-out-number-of-fridays-in-a-month#answer_1025095

在 MATLAB Online 中打开

Here is a really simple approach using CALENDAR():

M = calendar(2022,8);
N = nnz(M(:,6))
N = 4

Otherwise you could try using a DATETIME array:

D = datetime(2022,8,1);
V = D:D+calmonths(1)-caldays(1);
N = nnz(weekday(V)==6)
N = 4

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Cris LaPierre 2022-8-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1777940-how-to-find-out-number-of-fridays-in-a-month#answer_1025100

在 MATLAB Online 中打开

Not sure what your current code is, but what about something like this using weekday?

year = 2022;
month = 4;
dt = datetime(year,month,1):caldays(1):dateshift(datetime(year,month,1),'end',"month");
dys = weekday(dt)
dys = 1×30
     6     7     1     2     3     4     5     6     7     1     2     3     4     5     6     7     1     2     3     4     5     6     7     1     2     3     4     5     6     7
nFr = sum(dys==6)
nFr = 5