questionr (version 0.4.3)

cross.multi.table: Two-way frequency table between a multiple choices question and a factor

Description

This function allows to generate a two-way frequency table from a multiple choices question and a factor. The question's answers must be stored in a series of binary variables.

Usage

cross.multi.table(df, crossvar, weights = NULL, digits = 1, freq = FALSE,
  tfreq = "col", ...)

Arguments

df

data frame with the binary variables

crossvar

factor to cross the multiple choices question with

weights

optional weighting vector

digits

number of digits to keep in the output

freq

display percentages

tfreq

type of percentages to compute ("row" or "col")

...

arguments passed to multi.table

Value

• Object of class table.

Details

See the multi.table help page for details on handling of the multiple choices question and corresponding binary variables.

If freq is set to TRUE, the resulting table gives the columns percentages based on the contingency table of crossvar in the respondants population.

See Also

multi.table, multi.split, table

Examples

## Sample data frame
set.seed(1337)
sex <- sample(c("Man","Woman"),100,replace=TRUE)
jazz <- sample(c(0,1),100,replace=TRUE)
rock <- sample(c(TRUE, FALSE),100,replace=TRUE)
electronic <- sample(c("Y","N"),100,replace=TRUE)
weights <- runif(100)*2
df <- data.frame(sex,jazz,rock,electronic,weights)
## Two-way frequency table on 'music' variables by sex
cross.multi.table(df[,c("jazz", "rock","electronic")], df$sex, true.codes=list("Y"))
## Column percentages based on respondants
cross.multi.table(df[,c("jazz", "rock","electronic")], df$sex, true.codes=list("Y"), freq=TRUE)
## Row percentages based on respondants
cross.multi.table(df[,c("jazz", "rock","electronic")],
                  df$sex, true.codes=list("Y"), freq=TRUE, tfreq="row")