reshape (version 0.8.7)

add.all.combinations: Add all combinations

Description

Add all combinations of the given rows and columns to the data frames.

Usage

add.all.combinations(data, vars = list(NULL), fill=NA)

Arguments

data

data.frame

vars

variables (list of character vectors)

fill

value to fill structural missings with

Details

This function is used to ensure that we have a matrix of the appropriate dimensionaliy with no missing cells.

Examples

# NOT RUN {
rdunif <- 
function(n=20, min=0, max=10) floor(runif(n,min, max))
df <- data.frame(a = rdunif(), b = rdunif(),c = rdunif(), result=1:20)
add.all.combinations(df)
add.all.combinations(df, list("a", "b"))
add.all.combinations(df, list("a", "b"), fill=0)
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")))
# }