R: Paired Samples Contingency Tables

contTablesPaired {jmv}

R Documentation

Paired Samples Contingency Tables

Description

McNemar test

Usage

contTablesPaired(data, rows, cols, counts = NULL, chiSq = TRUE,
  chiSqCorr = FALSE, exact = FALSE, pcRow = FALSE, pcCol = FALSE)

Arguments

`data`	the data as a data frame
`rows`	a string naming the variable to use as the rows in the contingency table
`cols`	a string naming the variable to use as the columns in the contingency table
`counts`	a string naming the variable to use as counts, or NULL if each row represents a single observation
`chiSq`	`TRUE` (default) or `FALSE`, provide X²
`chiSqCorr`	`TRUE` or `FALSE` (default), provide X² with continuity correction
`exact`	`TRUE` or `FALSE` (default), provide an exact log odds ratio
`pcRow`	`TRUE` or `FALSE` (default), provide row percentages
`pcCol`	`TRUE` or `FALSE` (default), provide column percentages

Value

A results object containing:

`results$freqs`					a proportions table
`results$test`					a table of test results

Tables can be converted to data frames with asDF or as.data.frame. For example:

results$freqs$asDF

as.data.frame(results$freqs)

Examples

dat <- data.frame(
    `1st survey` = c('Approve', 'Approve', 'Disapprove', 'Disapprove'),
    `2nd survey` = c('Approve', 'Disapprove', 'Approve', 'Disapprove'),
    `Counts` = c(794, 150, 86, 570),
    check.names=FALSE)

contTablesPaired(dat, rows = '1st survey', cols = '2nd survey', counts = 'Counts')

#
#  PAIRED SAMPLES CONTINGENCY TABLES
#
#  Contingency Tables
#  ------------------------------------------------
#    1st survey    Approve    Disapprove    Total
#  ------------------------------------------------
#    Approve           794           150      944
#    Disapprove         86           570      656
#    Total             880           720     1600
#  ------------------------------------------------
#
#
#  McNemar Test
#  -----------------------------------------------------
#                                Value    df    p
#  -----------------------------------------------------
#    X²                           17.4     1    < .001
#    X² continuity correction     16.8     1    < .001
#  -----------------------------------------------------
#

[Package jmv version 0.9.2.0 Index]