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### library(metafor); library(testthat); Sys.setenv(NOT_CRAN="true")
### see also: https://www.metafor-project.org/doku.php/plots:funnel_plot_variations
source("settings.r")
context("Checking plots example: funnel plot variations")
test_that("plot can be drawn.", {
expect_equivalent(TRUE, TRUE) # avoid 'Empty test' message
skip_on_cran()
png("images/test_plots_funnel_plot_variations_test.png", res=200, width=1800, height=1800, type="cairo")
### fit equal-effects model
res <- rma(yi, vi, data=dat.hackshaw1998, measure="OR", method="EE")
### set up 2x2 array for plotting
par(mfrow=c(2,2))
### draw funnel plots
funnel(res, main="Standard Error")
funnel(res, yaxis="vi", main="Sampling Variance")
funnel(res, yaxis="seinv", main="Inverse Standard Error")
funnel(res, yaxis="vinv", main="Inverse Sampling Variance")
dev.off()
expect_true(.vistest("images/test_plots_funnel_plot_variations_test.png", "images/test_plots_funnel_plot_variations.png"))
})
rm(list=ls())
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