Dear Michael, Yes, I forgot about that, just typing the function's name. My fault, I am sorry.
Thank you very much for your reply. Best regards, Paulo ------------------------------------------------------- On 12-Nov-25 7:55, Michael Dewey wrote:
Dear Paulo You did realise that if you type prop.trend.test you get function (x, n, score = seq_along(x)) { method <- "Chi-squared Test for Trend in Proportions" dname <- paste(deparse1(substitute(x)), "out of", deparse1(substitute(n)), ",\n using scores:", paste(score, collapse = " ")) x <- as.vector(x) n <- as.vector(n) p <- sum(x)/sum(n) w <- n/p/(1 - p) a <- anova(lm(freq ~ score, data = list(freq = x/n, score = as.vector(score)), weights = w)) chisq <- c(`X-squared` = a["score", "Sum Sq"]) structure(list(statistic = chisq, parameter = c(df = 1), p.value = pchisq(as.numeric(chisq), 1, lower.tail = FALSE), method = method, data.name = dname), class = "htest") } <bytecode: 0x0000021d81d4c850> <environment: namespace:stats> Does that help? Michael On 11/11/2025 18:27, Paulo Barata wrote:To the R-Help list, About the prop.trend.test function, in the package stats. What calculations exactly does that function perform? What test is actually carried out? May I have some reference for the calculations performed by that function? I would like to suggest that some references (one or more) be included in the Help file for the function. Thank you very much. Paulo Barata Rio de Janeiro - Brazil ______________________________________________ [email protected] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting- guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ [email protected] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
