The semicond
data frame has 48 rows and 5 columns.
This data frame contains the following columns:
a numeric vector
a factor with levels 1
to 4
representing etch time.
a factor with levels 1
to 3
a factor with levels 1
to 4
an ordered factor with levels
1/1
< 1/2
< 1/3
< 2/1
< 2/2
< 2/3
< 3/1
< 3/2
< 3/3
< 4/1
< 4/2
< 4/3
Also found in the SASmixed
package