Help for funnel plot


New Member
Excuse me for this silly questionhow do I get a colour gradient like the one attached. Colours are a bit limited
Any specific code for the reference line and pseudo confidence lines. I use "lty", but this do both
Here is my argument
dat <- escalc("MD", m1i=Mean_TAP, sd1i= SD_TAP, n1i= N_TAP, m2i=Mean_caudal, sd2i= SD_caudal, n2i= N_caudal, slab=Study, data= Duration_of_analgesia)
res <- rma(yi, vi, data=dat, measure="MD", method="DL")
funnel(res, main="Duration of analegsia", back = 12, xlab="Mean difference (hours)", cex = 1.2, lwd = 2, lty = "solid", mgp = c(2, 1, 0), font.main = 1, font.lab = 2, font.axis = 2)
Thank you