Dear sir, I am Shibu John from Thrombosis Research Institute India. It is a multidisciplinary organisation concerned with the interrelated problems of thrombosis and atherosclerosis.
I was searching for Cochran armitage trend test program in R. Then I had seen your R coding for C-A trend test. I tried that in the R software. But I cant run the program due the [Error: could not find function "independence_test"]. Where is the declaration of this function? I was trying the trend test for Genotype frequency in Cases and controls. So I would like to know how to do the Monte carlo simulation test with Cochran armitage trend test. Sir can you please help me to solve the problem. Here I copied the codes from R > library("coin") Loading required package: survival Loading required package: splines Loading required package: mvtnorm Error: package 'modeltools' required by 'coin' could not be found In addition: Warning messages: 1: package 'coin' was built under R version 2.6.0 2: package 'survival' was built under R version 2.5.1 3: package 'mvtnorm' was built under R version 2.5.1 > lungtumor <- data.frame(dose = rep(c(0, 1, 2), c(40, 50, 48)), + tumor = c(rep(c(0, 1), c(38, 2)), + rep(c(0, 1), c(43, 7)), + rep(c(0, 1), c(33, 15)))) > table(lungtumor$dose, lungtumor$tumor) 0 1 0 38 2 1 43 7 2 33 15 > independence_test(tumor ~ dose, data = lungtumor, teststat = "quad") Error: could not find function "independence_test" > sincerely, Shibu John Research Assistant Department of Bioinformatics Thrombosis Research Institute Narayana Hrudayalaya 258/A Bommasandra Industrial Area, Anekal Taluk Bangalore 560099, India ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.