54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
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R Under development (unstable) (2024-04-17 r86441) -- "Unsuffered Consequences"
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Copyright (C) 2024 The R Foundation for Statistical Computing
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Platform: aarch64-unknown-linux-gnu
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R is free software and comes with ABSOLUTELY NO WARRANTY.
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You are welcome to redistribute it under certain conditions.
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Type 'license()' or 'licence()' for distribution details.
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R is a collaborative project with many contributors.
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Type 'contributors()' for more information and
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'citation()' on how to cite R or R packages in publications.
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Type 'demo()' for some demos, 'help()' for on-line help, or
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'help.start()' for an HTML browser interface to help.
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Type 'q()' to quit R.
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> library(survival)
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> #
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> # Test of the clogit function, and indirectly of the exact option
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> #
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> # Data set logan has the occupation of fathers, we create a
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> # multinomial response
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> #
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> nresp <- length(levels(logan$occupation))
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> n <- nrow(logan)
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> indx <- rep(1:n, nresp)
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> logan2 <- data.frame(logan[indx,],
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+ id = indx,
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+ occ2 = factor(rep(levels(logan$occupation), each=n)))
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> logan2$y <- (logan2$occupation == logan2$occ2)
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>
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> #We expect two NA coefficients, so ignore the warning
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> fit1 <- clogit(y ~ occ2 + occ2:education + occ2:race + strata(id), logan2)
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>
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> #since there is only one death per group, all methods are equal
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> dummy <- rep(1, nrow(logan2))
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> fit2 <- coxph(Surv(dummy, y) ~ occ2 + occ2:education + occ2:race + strata(id),
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+ logan2, method='breslow')
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>
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> all.equal(fit1$coefficients, fit2$coefficients)
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[1] TRUE
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> all.equal(fit1$loglik, fit2$loglik)
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[1] TRUE
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> all.equal(fit1$var, fit2$var)
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[1] TRUE
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> all.equal(fit1$residuals, fit2$residuals)
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[1] TRUE
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>
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>
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> proc.time()
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user system elapsed
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0.424 0.020 0.441
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