考虑以下代码绘制ROC曲线:
library(mada)
data(AuditC)
fit.reitsma <- reitsma(AuditC)
plot(fit.reitsma)
此代码将垂直和水平轴标题设置为&#34;灵敏度&#34;和&#34;误报率&#34;分别默认。我尝试使用以下代码更改标题:
plot(fit.reitsma, xlab="Specifity")
但这会产生错误:
Error in plot.default(c(2, 2), ylim = ylim, xlim = xlim, xlab = "False Positive Rate", :
formal argument "xlab" matched by multiple actual arguments
似乎它不允许更改标题。有线索吗?
答案 0 :(得分:3)
使用分步绘图将允许您更改轴。如果您按照reitsma-class {mada}
#calculate a SROC curve
my.sroc <- sroc(fit.reitsma)
# calculate a confidence region but do not plot it
my.cr <- ROCellipse(fit.reitsma)
# plot the confidence region in ROC space as a line
plot(my.cr$ROCellipse, type = "l", xlim = c(0,1), ylim = c(0,1), xlab="Specificity", ylab="Sensitivity")
lines(my.sroc)