我正在尝试使用代码来获取非线性回归,而不指定任何特定函数:
library(drc)
head(heartrate)
# pressure rate
#1 50.85 348.76
#2 54.92 344.45
#3 59.23 343.05
#4 61.91 332.92
#5 65.22 315.31
#6 67.79 313.50
library(ggplot2)
ggplot(heartrate, aes(pressure, rate)) +
geom_point() +
geom_smooth(method="nls", formula = rate ~ pressure)
但它给了我以下警告:
Warning message:
Computation failed in `stat_smooth()`:
object of type 'symbol' is not subsettable
该图仅显示点。没有绘制回归线。
如何更正此问题?