问题描述
在尝试使用 drc 包中的 ggplot 绘制剂量反应曲线时,我得到了一个半绘制的图。我正在尝试遵循剂量反应曲线上 recent paper 的补充信息中给出的程序。 这是我的原始数据
请帮我找到解决方案,谢谢!
# Fit a log-logistic model with lower and upper asymptotic limits fixed at respectively 0 and 100
mod.Pyr <- drm(gi ~ conc,data = my_data,fct = LL.4(fixed = c(NA,100,NA)))
# new dose levels as support for the line
newdata <- expand.grid(conc=exp(seq(log(0.5),log(3000),length=1000)))
# predictions and confidence intervals
pm <- predict(mod.Pyr,newdata=newdata,interval="confidence")
# new data with predictions
newdata$p <- pm[,1]
newdata$pmin <- pm[,2]
newdata$pmax <- pm[,3]
# need to shift conc == 0 a bit up,otherwise there are problems with coord_trans
my_data$conc0 <- my_data$conc
my_data$conc0[my_data$conc0 == 0] <- 0.5
# plotting the curve
ggplot(my_data,aes(x = conc0,y = gi)) +
geom_point() +
geom_ribbon(data=newdata,aes(x=conc,y=p,ymin=pmin,ymax=pmax),alpha=0.2) +
geom_line(data=newdata,y=p)) +
coord_trans(x="log") +
xlab("Concentration (mg/l)") + ylab("Growth inhibition")