我正在尝试使用geom_smooth
在我绘制的数据中添加一行,但我遇到了困难。
这是我的代码:
plot.BG = ggplot(data) + geom_point(aes(x=Mass_LT, y=BG, colour=factor(Temp.f)))
plot.BG + geom_smooth(method="lm")
BG
#[1] 79.56304 118.63903 84.03655 95.02984 67.90585 81.39920 74.73497 95.50199
#[9] 94.51260 88.08051 110.78937 96.89154 73.96888 74.04067 70.19670 69.80033
#[17] 64.49329 76.58780 98.73740 107.75642 71.05849 98.45971 101.67881 109.35420
#[25] 79.32484 69.71360 85.94306 101.25704 87.85497 119.07206 85.72013 98.91010
#[33] 95.27523 84.89955 93.42660 112.82913 121.77451 84.56991 67.66107 102.73335
Mass_LT
#[1] 0.000 6.154 0.000 2.128 3.169 5.986 1.916 0.000 5.956 0.566 0.000 0.000 0.530 4.813
#[15] 2.943 2.645 0.605 2.747 0.726 0.000 0.479 0.000 2.195 0.000 0.000 2.636 3.057 2.777
#[29] 1.909 4.657 0.000 0.000 0.000 0.000 3.203 0.000 0.000 6.157 0.635 0.000
sort(Mass_LT)
#[1] 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
#[15] 0.000 0.000 0.479 0.530 0.566 0.605 0.635 0.726 1.909 1.916 2.128 2.195 2.636 2.645
#[29] 2.747 2.777 2.943 3.057 3.169 3.203 4.657 4.813 5.956 5.986 6.154 6.157
Temp.f
是一个有2个级别的因素,图表和点数很好,但没有一条线,并且无法弄清楚原因。任何帮助将不胜感激。
答案 0 :(得分:5)
ggplot()
中定义的美学映射由后续层继承。但是,如果在层中定义的映射(例如,在geom_point()
内),则仅对该层是局部的。由于您希望geom_point
和geom_smooth
图层都使用相同的映射,因此请将它们放在初始ggplot()
调用中,它们将由两者继承。
重复使用mtcars
:
# only the points are displayed
ggplot(mtcars) +
geom_point(aes(x = hp, y = mpg, color = factor(cyl)) +
geom_smooth()
# you could respecify for the geom smooth, but that's repetitive
ggplot(mtcars) +
geom_point(aes(x = hp, y = mpg, color = factor(cyl)) +
geom_smooth(aes(x = hp, y = mpg, color = factor(cyl))
# put the mapping up front for all layers to inherit it
ggplot(mtcars, aes(x = hp, y = mpg, color = factor(cyl)) +
geom_point() +
geom_smooth()