| % File src/library/stats/man/prop.trend.test.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2009 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{prop.trend.test} |
| \title{Test for trend in proportions} |
| \usage{ |
| prop.trend.test(x, n, score = seq_along(x)) |
| } |
| \alias{prop.trend.test} |
| \arguments{ |
| \item{x}{ Number of events } |
| \item{n}{ Number of trials } |
| \item{score}{ Group score } |
| } |
| \description{ |
| Performs chi-squared test for trend in proportions, i.e., a test |
| asymptotically optimal for local alternatives where the log odds vary |
| in proportion with \code{score}. By default, \code{score} is chosen |
| as the group numbers. |
| } |
| \value{ |
| An object of class \code{"htest"} with title, test statistic, p-value, |
| etc. |
| } |
| \author{ Peter Dalgaard } |
| \note{ This really should get integrated with \code{prop.test} } |
| \seealso{ \code{\link{prop.test}}} |
| \examples{ |
| smokers <- c( 83, 90, 129, 70 ) |
| patients <- c( 86, 93, 136, 82 ) |
| prop.test(smokers, patients) |
| prop.trend.test(smokers, patients) |
| prop.trend.test(smokers, patients, c(0,0,0,1)) |
| } |
| \keyword{htest} |