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The Wafer data frame has 400 rows and 4 columns.
Wafer
This data frame contains the following columns:
a factor with levels 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10
a factor with levels 1 2 3 4 5 6 7 8
a numeric vector
# NOT RUN { str(Wafer) # }
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