tab_cross {surveytable}

Tabulate subsets or interactions

Description

Create subsets of the survey using one variable, and tabulate another variable within each of the subsets. Interact two variables and tabulate.

Usage

tab_cross(
  vr,
  vrby,
  max_levels = getOption("surveytable.max_levels"),
  csv = getOption("surveytable.csv")
)

tab_subset(
  vr,
  vrby,
  lvls = c(),
  test = FALSE,
  alpha = 0.05,
  drop_na = getOption("surveytable.drop_na"),
  max_levels = getOption("surveytable.max_levels"),
  csv = getOption("surveytable.csv")
)

Arguments

vr

variable to tabulate

vrby

use this variable to subset the survey

max_levels

a categorical variable can have at most this many levels. Used to avoid printing huge tables.

csv

name of a CSV file

lvls

(optional) only show these levels of vrby

test

perform hypothesis tests?

alpha

significance level for tests

drop_na

drop missing values (NA)? Categorical variables only.

Details

tab_subset creates subsets using the levels of vrby, and tabulates vr in each subset. Optionally, only use the lvls levels of vrby. vr can be categorical (factor), logical, or numeric.

tab_cross crosses or interacts vr and vrby and tabulates the new variable. Tables created using tab_subset and tab_cross have the same counts but different percentages. With tab_subset, percentages within each subset add up to 100%. With tab_cross, percentages across the entire population add up to 100%. Also see var_cross().

test = TRUE performs a test of association between the two variables. Also performs t-tests for all possible pairs of levels of vr and vrby.

Value

A list of tables or a single table.

See Also

Other tables: tab_rate(), tab_subset_rate(), tab(), total_rate(), total()

Examples

set_survey(namcs2019sv)

# For each SEX, tabulate AGER
tab_subset("AGER", "SEX")

# Same counts as tab_subset(), but different percentages.
tab_cross("AGER", "SEX")

# Numeric variables
tab_subset("NUMMED", "AGER")

# Hypothesis testing
tab_subset("NUMMED", "AGER", test = TRUE)