[R] How to perform a grouped shapiro wilk test on dataframe

ramoss ramine.mossadegh at finra.org
Fri Apr 5 16:50:07 CEST 2013


I was wandering if it is possible to perform on a dataframe called 'all' a
shapiro wilk normality test for COUNTS by variable Group

ACTIVITY?  Could it be done using plyer?  I saw an eg that applies to an
array but not to a dataframe:


Any thoughts would be much appreciated.

My dataframe is in shape:

1/1/13   XXXX      43
1/31/13 XXXX    60
1/1/13   YYYY     40
1/31/13 YYYY  10
etc  going for 3 months.

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