SSBtools (version 1.7.0)

Extend0rnd1: varGroups-attribute to Extend0, Example functions

Description

Setting attr(varGroups, "FunctionExtend0") to a function makes Extend0 behave differently

Usage

Extend0rnd1(data, varGroups, k = 1, rndSeed = 123)
Extend0rnd2(...)
Extend0rnd1b(...)

Value

a data frame

Arguments

data

data.frame within Extend0

varGroups

argument to Extend0

k

Number of rows generated is approx. k*nrow(data)

rndSeed

Internal random seed to be used

...

Extra unused parameters

Details

The point is to create a function that takes data and varGroups as input and that returns a data frame with a limited number of combinations of the elements in varGroups. The example function here is limited to two varGroups elements.

Examples

z <- SSBtoolsData("sprt_emp_withEU")[c(1, 5, 8, 14), ]
z$age[z$age == "Y15-29"] <- "young"
z$age[z$age == "Y30-64"] <- "old"

varGroups <- list(c("year", "geo", "eu"), data.frame(age = c("middle", "old")))
Extend0(z, varGroups = varGroups)

attr(varGroups, "FunctionExtend0") <- Extend0rnd1
Extend0(z, varGroups = varGroups)

attr(varGroups, "FunctionExtend0") <- Extend0rnd1b
Extend0(z, varGroups = varGroups)

attr(varGroups, "FunctionExtend0") <- Extend0rnd2
Extend0(z, varGroups = varGroups)

# To see what's going on internally. Data used only via nrow 
varGroups <- list(data.frame(ab = rep(c("a", "b"), each = 4), abcd = c("a", "b", "c", "d")), 
                  data.frame(AB = rep(c("A", "B"), each = 3), ABC = c("A", "B", "C"))) 
a <- Extend0rnd1(data.frame(1:5), varGroups)
table(a[[1]], a[[2]])
table(a[[3]], a[[4]])
a <- Extend0rnd1b(data.frame(1:5), varGroups)
table(a[[1]], a[[2]])
table(a[[3]], a[[4]])
a <- Extend0rnd2(data.frame(1:5), varGroups[2:1])
table(a[[1]], a[[2]])
table(a[[3]], a[[4]])
a <- Extend0rnd1(data.frame(1:100), varGroups)
table(a[[1]], a[[2]]) # Maybe smaller numbers than expected since duplicates were removed
table(a[[3]], a[[4]])