The "upper_errobar" is not a really halferrorbar

[toxintoxin]

Taking the bar chart as an example, the errorbar can only show half of it when the error bar is plotted first and then the bar, but that doesn't work if the fill has transparency, I started to turn to your upper_errorbar in ggadd(), but found out that it really just means that ymin=mean, which is the same as the effect of geom_errorbar(aes(ymin=mean,ymax=mean+sd)) in ggplot2, and not really the half of the above errorbar, which is supposed to look like a letter T