我正在尝试在 R (ggplot2) 中重新创建一个特定的情节

Question

尽管尝试了多种类型的线，但我还是无法得到相同的结果。这是我需要的线条：

这就是我到目前为止的方式（并且停留在）：

这是我的代码：

myData <- read.csv(file.choose(), header = TRUE)
require(ggplot2)
g <- ggplot(myData, aes(speed, resp))
g + geom_point(aes(color = padlen, shape = padlen)) +
geom_smooth(method = "lm", formula = y ~ splines::bs(x, df = 4, degree = 2), se = FALSE, aes(color = padlen), linetype = "solid", size = 1) +
scale_color_manual(values = c("red", "black")) +
scale_shape_manual(values = c(2, 1))

这是数据库 (dput)：

myData <- structure(list(resp = c(0, 0.125, 0.583333333, 1, 0.958333333, 
1, 0, 0.041666667, 0.25, 0.916666667, 1, 1), padlen = structure(c(2L, 
2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L), .Label = c("big", 
"small"), class = "factor"), speed = c(2L, 3L, 4L, 5L, 6L, 7L, 
2L, 3L, 4L, 5L, 6L, 7L)), .Names = c("resp", "padlen", "speed"
), class = "data.frame", row.names = c(NA, -12L))

我也尝试了所有这些多项式模型（和其他模型），但 none 有效：

## Quadratic model
lmQuadratic <- lm(formula = y ~ x + I(x^2),
                  data    = fpeg)
## Cubit model
lmCubic <- lm(formula = y ~ x + I(x^2) + I(x^3),
              data    = fpeg)
## Fractional polynomial model
lmFractional <- lm(formula = y ~ x + I(x^2) + I(x^(1/2)),
                   data    = fpeg)

那么，我应该do/not 怎么做才能让我的台词和原来的台词一样呢？谢谢。

Answer 1

不要在 geom_smooth 函数中使用 method = "lm"，而是使用具有二项式族的 glm。 glm-smooth 只为您提供 0 到 1 之间的值（您想要的值，因为您正在处理比例）。

library(ggplot2)

ggplot(myData, aes(speed, resp)) + 
  geom_point(aes(color = padlen, shape = padlen)) +
  geom_smooth(method = "glm", method.args = list(family = "binomial"), 
              se = FALSE, aes(color = padlen), linetype = "solid", size = 1) +
  scale_color_manual(values = c("red", "black")) +
  scale_shape_manual(values = c(2, 1)) +
  theme_classic()

数据

myData <- 
  structure(list(resp = c(0, 0.125, 0.583333333, 1, 0.958333333, 1, 0, 
                          0.041666667, 0.25, 0.916666667, 1, 1), 
                 padlen = c("small", "small", "small", "small", "small", 
                            "small", "big", "big", "big", "big", "big", "big"), 
                 speed = c(2L, 3L, 4L, 5L, 6L, 7L, 2L, 3L, 4L, 5L, 6L, 7L)), 
            .Names = c("resp", "padlen", "speed"), class = "data.frame", 
            row.names = c(NA, -12L))

我正在尝试在 R (ggplot2) 中重新创建一个特定的情节

I'm trying to recreate a specific plot in R (ggplot2)

r

ggplot2

lines

spline