r ggplot动态使用plotmath表达式
我想使用ggplot动态更改轴标签。下面的代码是我想做的简单版本。它在y轴上正确地显示了一个度符号。注释掉的ylab代码行是我想做的,但失败了。我想创建plotmath代码,将其分配给变量(例如yLabel),然后让ggplot解释它r ggplot动态使用plotmath表达式,r,ggplot2,plotmath,R,Ggplot2,Plotmath,我想使用ggplot动态更改轴标签。下面的代码是我想做的简单版本。它在y轴上正确地显示了一个度符号。注释掉的ylab代码行是我想做的,但失败了。我想创建plotmath代码,将其分配给变量(例如yLabel),然后让ggplot解释它 library(data.table) library(ggplot2) DT <- data.table(timeStamp=c(1:12), ColN1=runif(12, 0, 10)) DT.long <- data.table::melt(
library(data.table)
library(ggplot2)
DT <- data.table(timeStamp=c(1:12), ColN1=runif(12, 0, 10))
DT.long <- data.table::melt(
DT, id.vars = c("timeStamp"))
yLabel <- "Temperature~(~degree~F)"
yLabel1 <- expression("Temperature~(~degree~F)")
p <- ggplot(data = DT.long, aes(x = timeStamp, y = value)) +
xlab("Time") +
# ylab( expression(paste("Value is ", yLabel,","))) +
# ylab(yLabel) +
# ylab(yLabel1) +
ylab(Temperature~(~degree~F)) +
scale_y_continuous() +
theme_bw() +
geom_line()
print(p)
库(data.table)
图书馆(GG2)
DT使用bquote
这是您的动态组件
temp <- 12
或者回答下面的附加问题
V = "Temperature is ("~degree~"F)"
W = "depth is ("~degree~"C)"
ggplot(data = DT.long, aes(x = timeStamp, y = value)) +
xlab("Time") +
ylab(bquote(.(V)))
ggplot(data = DT.long, aes(x = timeStamp, y = value)) +
xlab("Time") +
ylab(bquote(.(W)))
我在动态修改axis标签时遇到了同样的问题,B Williams的回答帮助了我
解决方案:
dynamic <- "dynamic text"
# Put the dynamic text in its right context
str <- sprintf("Static label text [%s]", dynamic)
# Use multiplication "*" rather than "~" to build the expression to avoid unnecessary space
complete_label <- bquote(.(str)[subscript]*"/L")
这不管用。我想将“温度是…”赋值给一个变量(比如V),然后使用ylab(V)。我尝试了ylab(bquote(.V)
,但没有成功。
dynamic <- "dynamic text"
# Put the dynamic text in its right context
str <- sprintf("Static label text [%s]", dynamic)
# Use multiplication "*" rather than "~" to build the expression to avoid unnecessary space
complete_label <- bquote(.(str)[subscript]*"/L")
library(ggplot2)
ggplot() + labs(x = complete_label)