# Skip tests if gbm is not installed testthat::skip_if_not_installed("glmnet") # To pass the noLD checks eps <- if (capabilities("long.double")) sqrt(.Machine$double.eps) else 0.1 # Create data---- n <- 100 alp <- 0.05 lambda_t0 <- 1 lambda_t1 <- 3 times <- c(rexp(n = n, rate = lambda_t0), rexp(n = n, rate = lambda_t1)) censor <- rexp(n = 2 * n, rate = -log(alp)) times_c <- pmin(times, censor) event_c <- 1 * (times < censor) DF <- data.frame("ftime" = times_c, "event" = event_c, "Z" = c(rep(0, n), rep(1, n))) DT <- data.table("ftime" = times_c, "event" = event_c, "Z" = c(rep(0, n), rep(1, n))) extra_vars <- matrix(rnorm(10 * n), ncol = 10) DF_ext <- cbind(DF, as.data.frame(extra_vars)) DT_ext <- cbind(DT, as.data.table(extra_vars)) formula_glmnet <- formula(paste(c("event ~ ftime", "Z", paste0("V", 1:10)), collapse = " + ")) # Fitting---- test_that("no error in fitting glmnet", { fitDF <- try(fitSmoothHazard(formula_glmnet, data = DF_ext, time = "ftime", family = "glmnet", ratio = 10), silent = TRUE) fitDT <- try(fitSmoothHazard(formula_glmnet, data = DT_ext, time = "ftime", family = "glmnet", ratio = 10), silent = TRUE) expect_false(inherits(fitDF, "try-error")) expect_false(inherits(fitDT, "try-error")) }) #include categorical predictor cat_predictor <- factor(sample(c("no", "yes"), n, replace = TRUE)) extra_vars <- matrix(rnorm(9 * n), ncol = 9) DT_cat <- cbind(DT, data.table(extra_vars, V10 = cat_predictor)) formula_cat <- formula(paste(c("event ~ ftime", "Z", paste0("V", 1:10)), collapse = " + ")) test_that("no error in glmnet with categorical vars", { fitDT <- try(fitSmoothHazard(formula_cat, data = DT_cat, time = "ftime", family = "glmnet", ratio = 10), silent = TRUE) riskDT <- try(absoluteRisk(fitDT, time = 0.5), silent = TRUE) expect_false(inherits(fitDT, "try-error")) expect_false(inherits(riskDT, "try-error")) }) # Absolute risk---- fitDF_glmnet <- fitSmoothHazard(formula_glmnet, data = DF_ext, time = "ftime", family = "glmnet", ratio = 10) fitDT_glmnet <- fitSmoothHazard(formula_glmnet, data = DT_ext, time = "ftime", family = "glmnet", ratio = 10) newDT <- data.table("Z" = c(0, 1)) newDF <- data.frame("Z" = c(0, 1)) extra_vars_new <- matrix(rnorm(10 * 2), ncol = 10) colnames(extra_vars_new) <- paste0("V", 1:10) newDF_ext <- cbind(newDF, extra_vars_new) newDT_ext <- cbind(newDT, extra_vars_new) test_that("no error in fitting glmnet", { riskDF <- try(absoluteRisk(fitDF_glmnet, time = 0.5, newdata = newDF_ext), silent = TRUE) riskDT <- try(absoluteRisk(fitDT_glmnet, time = 0.5, newdata = newDT_ext), silent = TRUE) riskDF_mc <- try(absoluteRisk(fitDF_glmnet, time = 0.5, newdata = newDF_ext, nsamp = 10, method = "montecarlo"), silent = TRUE) riskDT_mc <- try(absoluteRisk(fitDT_glmnet, time = 0.5, newdata = newDT_ext, nsamp = 10, method = "montecarlo"), silent = TRUE) expect_false(inherits(riskDF, "try-error")) expect_false(inherits(riskDT, "try-error")) expect_false(inherits(riskDF_mc, "try-error")) expect_false(inherits(riskDT_mc, "try-error")) }) test_that("no error in using custom lambda in glmnet", { riskDF <- try(absoluteRisk(fitDF_glmnet, time = 0.5, newdata = newDF_ext, s = 0.1), silent = TRUE) riskDT <- try(absoluteRisk(fitDT_glmnet, time = 0.5, newdata = newDT_ext, s = 0.1), silent = TRUE) expect_false(inherits(riskDF, "try-error")) expect_false(inherits(riskDT, "try-error")) }) test_that("output probabilities", { riskDF_glmnet <- absoluteRisk(fitDF_glmnet, time = 0.5, newdata = newDF_ext, family = "glmnet") riskDT_glmnet <- absoluteRisk(fitDT_glmnet, time = 0.5, newdata = newDT_ext, family = "glmnet") expect_true(all(riskDF_glmnet >= 0 - eps)) expect_true(all(riskDT_glmnet >= 0 - eps)) expect_true(all(riskDF_glmnet <= 1 + eps)) expect_true(all(riskDT_glmnet <= 1 + eps)) }) # Matrix interface---- N <- 1000; p <- 30 nzc <- 0.33 * p x <- matrix(rnorm(N * p), N, p) dimnames(x)[[2]] <- paste0("x", seq_len(p)) beta <- rnorm(nzc) fx <- x[, seq(nzc)] %*% (0.33 * beta) hx <- exp(fx) ty <- rexp(N, hx) tcens <- rbinom(n = N, prob = 0.3, size = 1) # censoring indicator y <- cbind(time = ty, status = 1 - tcens) # y=Surv(ty,1-tcens) with survival test_that("no error in fitting fitSmoothHazard.fit", { fit_glmnet <- try(fitSmoothHazard.fit(x, y, time = "time", event = "status", family = "glmnet", ratio = 10, lambda = c(0, 0.5)), silent = TRUE) expect_false(inherits(fit_glmnet, "try-error")) }) test_that("no error in using nonlinear functions of time", { skip_if_not_installed("splines") library(splines) fit_glmnet <- try(fitSmoothHazard.fit(x, y, formula_time = ~ log(time), time = "time", event = "status", family = "glmnet", ratio = 10, lambda = c(0, 0.5)), silent = TRUE) fit_glmnet_sp <- try(fitSmoothHazard.fit(x, y, formula_time = ~ bs(time), time = "time", event = "status", family = "glmnet", ratio = 10, lambda = c(0, 0.5)), silent = TRUE) expect_false(inherits(fit_glmnet, "try-error")) expect_false(inherits(fit_glmnet_sp, "try-error")) }) # Absolute risk with matrix interface---- # Only family="glmnet" has been implemented fit_glmnet <- fitSmoothHazard.fit(x, y, time = "time", event = "status", family = "glmnet", ratio = 10, lambda = c(0, 0.5)) fit_glmnet_log <- fitSmoothHazard.fit(x, y, formula_time = ~ log(time), time = "time", event = "status", family = "glmnet", ratio = 10, lambda = c(0, 0.5)) new_x <- x[1:10, ] risk <- try(absoluteRisk(fit_glmnet, time = 1, newdata = new_x, nsamp = 100), silent = TRUE) risk_log <- try(absoluteRisk(fit_glmnet_log, time = 1, newdata = new_x, nsamp = 100), silent = TRUE) test_that("no error in absoluteRisk with glmnet", { expect_false(inherits(risk, "try-error")) expect_false(inherits(risk_log, "try-error")) }) test_that("we get probabilities", { expect_true(all(risk >= 0 - eps)) expect_true(all(risk <= 1 + eps)) expect_true(all(risk_log >= 0 - eps)) expect_true(all(risk_log <= 1 + eps)) }) test_that("should compute risk when time and newdata aren't provided", { fit_glmnet_red <- fit_glmnet fit_glmnet_red$originalData$x <- fit_glmnet_red$originalData$x[c(1:2, 101:102), ] risk <- try(absoluteRisk(fit_glmnet_red, nsamp = 10), silent = TRUE) fit_glmnetred2 <- fit_glmnet_log fit_glmnetred2$originalData$x <- fit_glmnetred2$originalData$x[c(1:2, 101:102), ] risk_log <- try(absoluteRisk(fit_glmnetred2, nsamp = 100), silent = TRUE) expect_false(inherits(risk, "try-error")) expect_false(inherits(risk_log, "try-error")) }) # Test absoluteRisk--two time points risk <- try(absoluteRisk(fit_glmnet, time = c(1, 2), newdata = new_x, nsamp = 100), silent = TRUE) risk_log <- try(absoluteRisk(fit_glmnet_log, time = c(1, 2), newdata = new_x, nsamp = 100), silent = TRUE) test_that("no error in absoluteRisk with glmnet", { expect_false(inherits(risk, "try-error")) expect_false(inherits(risk_log, "try-error")) }) test_that("we get probabilities", { expect_true(all(risk[, -1] >= 0 - eps)) expect_true(all(risk[, -1] <= 1 + eps)) expect_true(all(risk_log[, -1] >= 0 - eps)) expect_true(all(risk_log[, -1] <= 1 + eps)) })