if (requiet("survival")) { f1 <- as.formula("Surv(time, status) ~ strata(sex) * x + x2") f2 <- as.formula("Surv(time, status) ~ x * strata(sex) * x2") f3 <- as.formula("Surv(time, status) ~ x + x2 * strata(sex)") f4 <- as.formula("Surv(time, status) ~ strata(sex) + x + x2") f5 <- as.formula("Surv(time, status) ~ x * strata(sex) + x2") f6 <- as.formula("Surv(time, status) ~ x + x2 + strata(sex)") dat <- list( time = c(4, 3, 1, 1, 2, 2, 3), status = c(1, 1, 1, 0, 1, 1, 0), x = c(0, 2, 1, 1, 1, 0, 0), x2 = c(0, 2, 1, 0, 1, 1, 0), sex = c(0, 0, 0, 0, 1, 1, 1) ) test_that("find_predictors strata1", { mod <- suppressWarnings(coxph(f1, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) test_that("find_predictors strata2", { mod <- suppressWarnings(coxph(f2, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) test_that("find_predictors strata3", { mod <- suppressWarnings(coxph(f3, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) test_that("find_predictors strata4", { mod <- suppressWarnings(coxph(f4, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) test_that("find_predictors strata5", { mod <- suppressWarnings(coxph(f5, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) test_that("find_predictors strata6", { mod <- suppressWarnings(coxph(f6, data = dat, ties = "breslow")) expect_equal(find_predictors(mod), list(conditional = c("x", "x2"), strata = "sex")) }) }
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