Create a Data Frame from All Combinations of Factors
Expand(`_data`, ...)Data.frame
vectors, factors or a list containing these
Simple wrapper of the 'expand.grid' function. If x is a table then a data frame is returned with one row pr individual observation.
dd <- Expand(iris, Sepal.Length=2:8, Species=c("virginica","setosa"))
summary(dd)
#> Sepal.Length Species
#> Min. :2.00 setosa :7
#> 1st Qu.:3.25 versicolor:0
#> Median :5.00 virginica :7
#> Mean :5.00
#> 3rd Qu.:6.75
#> Max. :8.00
T <- with(warpbreaks, table(wool, tension))
Expand(T)
#> wool tension
#> 1 A L
#> 1.1 A L
#> 1.2 A L
#> 1.3 A L
#> 1.4 A L
#> 1.5 A L
#> 1.6 A L
#> 1.7 A L
#> 1.8 A L
#> 2 B L
#> 2.1 B L
#> 2.2 B L
#> 2.3 B L
#> 2.4 B L
#> 2.5 B L
#> 2.6 B L
#> 2.7 B L
#> 2.8 B L
#> 3 A M
#> 3.1 A M
#> 3.2 A M
#> 3.3 A M
#> 3.4 A M
#> 3.5 A M
#> 3.6 A M
#> 3.7 A M
#> 3.8 A M
#> 4 B M
#> 4.1 B M
#> 4.2 B M
#> 4.3 B M
#> 4.4 B M
#> 4.5 B M
#> 4.6 B M
#> 4.7 B M
#> 4.8 B M
#> 5 A H
#> 5.1 A H
#> 5.2 A H
#> 5.3 A H
#> 5.4 A H
#> 5.5 A H
#> 5.6 A H
#> 5.7 A H
#> 5.8 A H
#> 6 B H
#> 6.1 B H
#> 6.2 B H
#> 6.3 B H
#> 6.4 B H
#> 6.5 B H
#> 6.6 B H
#> 6.7 B H
#> 6.8 B H