我要为ggplot放置置信区间误差线。
我有一个数据集,并使用ggplot将其绘制为:
df <- data.frame(
Sample=c("Sample1", "Sample2", "Sample3", "Sample4", "Sample5"),
Weight=c(10.5, NA, 4.9, 7.8, 6.9))
p <- ggplot(data=df, aes(x=Sample, y=Weight)) +
geom_bar(stat="identity", fill="black") +
scale_y_continuous(expand = c(0,0), limits = c(0, 8)) +
theme_classic() +
theme(axis.text.x = element_text(angle = 45, hjust = 1)
p
我不熟悉添加错误栏。我使用geom_bar查看了一些选项,但无法正常工作。
对于将置信区间误差线放在小节图中的任何帮助,我将不胜感激。谢谢!
答案 0 :(得分:2)
使用geom_errorbar
df <- data.frame(
Sample=c("Sample1", "Sample2", "Sample3", "Sample4", "Sample5"),
Average.Weight=c(10.5, NA, 4.9, 7.8, 6.9),
# arbitrarily make up some Standard Errors for each mean:
SE = c(1, NA, .3, .25, .2)) # JUST MAKING THINGS UP HERE
现在您有了一个数据框,其中包含您研究中每个样本的Average Weight
和SE
列。使用ggplot
进行绘制:
ggplot(data = na.omit(df)) + #don't bother plotting the NA
geom_bar(stat = "identity", aes(x = Sample,y = Average.Weight)) +
geom_errorbar(
aes(x=Sample,
ymin = Average.Weight - 2*SE,
ymax = Average.Weight + 2*SE),
color = "red"
)