add.all.combinations {reshape} | R Documentation |
Add all combinations of the given rows and columns to the data frames.
add.all.combinations(data, vars = list(NULL))
data |
data.frame |
vars |
variables (list of character vectors) |
This function is used to ensure that we have a matrix of the appropriate dimensionaliy with no missing cells.
Hadley Wickham <h.wickham@gmail.com>
rdunif <- function(n=20, min=0, max=10) floor(runif(n,min, max)) df <- data.frame(a = rdunif(), b = rdunif(),c = rdunif()) add.all.combinations(df) add.all.combinations(df, list("a", "b")) add.all.combinations(df, list(c("a", "b"))) add.all.combinations(df, list("a", "b", "c")) add.all.combinations(df, list(c("a", "b"), "c")) add.all.combinations(df, list(c("a", "b", "c")))