[R] Extraction from an output

Chuck Cleland ccleland at optonline.net
Mon Jan 12 13:32:08 CET 2009


On 1/12/2009 6:42 AM, robert-mcfadden at o2.pl wrote:
> Hello,
> Would you tell my how to extract a result from a test - it's justified because I need to run this test many times. Here is an  example from authors' test:
> 
>> library("coin")
>> 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))))
>> ca.test<-independence_test(tumor ~ dose, data = lungtumor, teststat = "quad")
>> ca.test
> 
>         Asymptotic General Independence Test
> 
> data:  tumor by dose 
> chi-squared = 10.6381, df = 1, p-value = 0.001108 
> 
> How to use ca.test and extract p-value and chi-squared.

> pvalue(ca.test)
[1] 0.001107836

> statistic(ca.test)
[1] 10.63806

  See the "Value" subsection on the help page for independence_test().

> Robert 
> 
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-- 
Chuck Cleland, Ph.D.
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