| Note that in the example we will use a Monday dummy and a Fridaydummy. These dummies are easily created with the Calculator (recall that the dataset is dated). First, use the function dayofweek() to created a variable DAY with DAY = 2 on Mondays, 3 on Wednesdays, etc. Then, create the Monday and Friday dummy as follows: Monday =Day == 2 and Friday = Day == 6. 这一段具体怎么操作的 我试了下 实在是不会啊, 有做过的教教我,感激不尽
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