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### library(metafor); library(testthat); Sys.setenv(NOT_CRAN="true")
### see also: https://www.metafor-project.org/doku.php/plots:contour_enhanced_funnel_plot
source("settings.r")
context("Checking plots example: contour-enhanced funnel plot")
test_that("plot can be drawn.", {
expect_equivalent(TRUE, TRUE) # avoid 'Empty test' message
skip_on_cran()
png("images/test_plots_contour_enhanced_funnel_plot_test.png", res=200, width=1800, height=1500, type="cairo")
### decrease margins so the full space is used
par(mar=c(5,4,1,2))
### fit random-effects model
res <- rma(ai=tpos, bi=tneg, ci=cpos, di=cneg, data=dat.bcg, measure="RR",
slab=paste(author, year, sep=", "), method="REML")
### create contour enhanced funnel plot (with funnel centered at 0)
funnel(res, level=c(90, 95, 99), shade=c("white", "gray55", "gray75"), refline=0, legend=TRUE)
dev.off()
expect_true(.vistest("images/test_plots_contour_enhanced_funnel_plot_test.png", "images/test_plots_contour_enhanced_funnel_plot.png"))
})
rm(list=ls())
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