将上标和包含<的变量标签结合使用时,请使用ggplot geom_text.象征 [英] Using ggplot geom_text when combining superscript and variable label that contains < symbol
问题描述
我在向多面图添加R2注释时遇到麻烦,其中我的R2值有时< 0.01(是的,不是很好的回归).我希望R2中的2成为上标.我尝试了几种选择,但似乎受<我的价值观中的符号
I am having trouble adding R2 annotations to a faceted plot, where my R2 values are sometimes <0.01 (yes, it's not a good regression). I would like the 2 of R2 to be superscript. I have tried several options but seem to be stymied by the < symbol in my values
例如,使用虹膜数据集,我首先用先前计算出的R2值设置了一个新的数据帧.x&还设置了y位置,因为每个方面的位置都不同(对于虹膜数据集不是必需的,但对我来说是必需的)
eg, using the iris data set, I first set up a new data frame with my R2 values previously calculated. The x & y positions are also set up as these are different for every facet (not essential for the iris dataset, but it is for mine)
SEr2s <- data.frame(Species = c("virginica", "setosa", "versicolor" ),
xpos = c(5,7,7), ypos = c(4.2, 2, 4.2),
lab = c("<0.01","0.08", "0.05"))
然后我运行我的情节:
XYPlot<-ggplot(data = iris, aes(x=Sepal.Length)) +
geom_point(aes(y = Sepal.Width), colour="grey40")+
geom_smooth(aes(y = Sepal.Width), col="grey40", lwd=0.5, method="lm", se=FALSE) +
geom_text(data = SEr2s, size=3, vjust=0, hjust=0,
aes(x = xpos, y = ypos,
label = paste("r^2==",lab)), parse = TRUE)+
theme_bw() +
theme(strip.background = element_blank(), strip.placement = "outside",
panel.grid.minor = element_blank(), legend.position = "right") +
facet_wrap(~Species)
我收到此错误:
解析错误(text = text [[i]])::1:7:意外的'<'1:r ^ 2 ==<^
Error in parse(text = text[[i]]) : :1:7: unexpected '<' 1: r^2== < ^
是否可以更改代码或标签数据框,以使其不尝试评估这些符号?
Is there a way to change my code or my labelling dataframe so that it doesn't try to evaluate these symbols?
推荐答案
我认为更简单的解决方案是在data.frame( SEr2s
)中定义下标:
I think that the easier solution is to define the subscript in your data.frame (SEr2s
):
SEr2s <- data.frame(Species = c("virginica", "setosa", "versicolor" ),
xpos = c(5,7,7), ypos = c(4.2, 2, 4.2),
lab = c("atop(R^2<0.01)","atop(R^2==0.08)", "atop(R^2==0.05)"))
然后,您可以仅通过 label = lab
来调用ggplot:
Then, you can call ggplot without just with label=lab
:
ggplot(data = iris, aes(x=Sepal.Length)) +
geom_point(aes(y = Sepal.Width), colour="grey40")+
geom_smooth(aes(y = Sepal.Width), col="grey40", lwd=0.5, method="lm", se=FALSE) +
geom_text(data = SEr2s, size=3, vjust=0, hjust=0,
aes(x = xpos, y = ypos,
label = lab), parse = TRUE)+
theme_bw() +
theme(strip.background = element_blank(), strip.placement = "outside",
panel.grid.minor = element_blank(), legend.position = "right") +
facet_wrap(~Species)
我认为这为您提供了您想要的情节: https://ibb.co/vwbvqp2
I think this gives you the plot you want: https://ibb.co/vwbvqp2
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