在 ggplot2 中,我正在尝试一件简单的事情,但由于某种原因我无法做到。我已经在数据框中调整了均值和 SE,并且想要绘制均值、误差线,然后将均值与点连接起来。这是代码和错误(除了连接方式之外,它会做所有事情geom_line
(使用RCookbook:
library(ggplot2)
#data set
data1 <- structure(list(group = structure(1:3, .Label = c("1", "2", "3"
), class = "factor"), estimate = c(55.7466654122763, 65.0480954172939,
61.9552391704298), SE = c(2.33944612149257, 2.33243565412438,
2.33754952927041), t.ratio = c(23.8290016171476, 27.8884844271143,
26.5043535525714)), .Names = c("group", "estimate", "SE", "t.ratio"
), row.names = c(NA, 3L), class = "data.frame")
#the attempted plot
pd <- position_dodge(.1)
ggplot(data1, aes(x=group, y=estimate, group=group)) +
geom_errorbar(aes(ymin=estimate-SE, ymax=estimate+SE),
colour="black", width=.1, position=pd) +
geom_line(data=data1, aes(x=group, y=estimate)) +
geom_point(position=pd, size=4)
错误:
ymax not defined: adjusting position using y instead
geom_path: Each group consist of only one observation. Do you need to adjust the group aesthetic?