更改主题后,ggpairs中的自定义图例将消失
我对更改主题后,ggpairs中的自定义图例将消失,r,themes,legend,ggpairs,R,Themes,Legend,Ggpairs,我对ggpairs中消失的图例有问题 我在下三角ggpairs图的顶部添加了一个图例,如下所示 首先,我创建了一个不带图例的ggpairs绘图,然后我从中提取我想要的图例和特殊图形,并将其放置在ggpairs中,用putPlot绘图。它工作得很好,直到我试图修改主题,使传奇消失 # 1 produce graph without legend library(GGally) library(ggplot2) plotwithoutlegend <-ggpairs( iris,
ggpairs
中消失的图例有问题
我在下三角ggpairs
图的顶部添加了一个图例,如下所示
首先,我创建了一个不带图例的ggpairs
绘图,然后我从中提取我想要的图例和特殊图形,并将其放置在ggpairs
中,用putPlot
绘图。它工作得很好,直到我试图修改主题,使传奇消失
# 1 produce graph without legend
library(GGally)
library(ggplot2)
plotwithoutlegend <-ggpairs(
iris,
columns=1:4,
switch="both",
upper="blank",
mapping=aes(color = Species,
shape= Species,
fill=Species,
alpha=0.5)
)
#2 grab the legend from a graph with the legend I want (without alpha).
auxplot <- ggplot(iris, aes(x=Petal.Length, y=Petal.Width,
color=Species,
shape=Species,
fill=Species)) + geom_point()
mylegend <- grab_legend(auxplot)
# 3 place the legend in the ggpairs grid with putPlot
graph1 <- putPlot(plotwithoutlegend,mylegend,3,4)
show(graph1)
更改主题后,图例消失:
在此学习:
#首先运行代码,直到
图2我也有类似的问题。我认为您需要使用库(网格)
。看看我的解决方案
# plotwithoutlegend
plotwithoutlegend <- ggpairs(
iris,
columns=1:4,
switch="both",
upper="blank",
mapping=aes(color = Species,
shape= Species,
fill=Species,
alpha=0.5)
)+
theme(strip.background =element_blank(), strip.placement = "outside")
#2 grab the legend from a graph with the legend I want (without alpha).
auxplot <- ggplot(iris, aes(x=Petal.Length, y=Petal.Width,
color=Species,
shape=Species,
fill=Species)) + geom_point()
mylegend <- grab_legend(auxplot)
##### plot legend with plot
grid.newpage()
grid.draw(plotwithoutlegend)
vp = viewport(x=.9, y=.75, width=.35, height=.3) ## control legend position
pushViewport(vp)
grid.draw(mylegend)
upViewport()
#不带图例的绘图
没有图例的绘图谢谢TarJae,我已经看到了这个解决方案,但问题是我不想在图例中使用alpha(但我想在图形中使用alpha),我想要形状。这就是我使用自定义图例的原因。谢谢Sam_9090。这正是我想要的。我只是觉得应该有一个更简单的答案,在主题()之前,传说出现在正确的地方。我想推荐你的答案,但名声不好。
# first run your code until
graph2 <- graph1 +theme(strip.background =element_blank(), strip.placement = "outside")
# then run this code
colidx <- c(3,5,6,7)
for (i in 1:length(colidx)) {
# Address only the diagonal elements
# Get plot out of plot-matrix
inner <- getPlot(graph2, i, i);
# Add ggplot2 settings (here we remove gridlines)
inner <- inner + theme(panel.grid = element_blank()) +
theme(axis.text.x = element_blank())
# Put it back into the plot-matrix
graph2 <- putPlot(graph2, inner, i, i)
for (j in 1:length(colidx)){
if((i==1 & j==1)){
# Move the upper-left legend to the far right of the plot
inner <- getPlot(graph2, i, j)
inner <- inner + theme(legend.position=c(length(colidx)-0.25,0.50))
graph2 <- putPlot(graph2, inner, i, j)
}
else{
# Delete the other legends
inner <- getPlot(graph2, i, j)
inner <- inner + theme(legend.position="none")
graph2 <- putPlot(graph2, inner, i, j)
}
}
}
# then run this code
show(graph2)
# plotwithoutlegend
plotwithoutlegend <- ggpairs(
iris,
columns=1:4,
switch="both",
upper="blank",
mapping=aes(color = Species,
shape= Species,
fill=Species,
alpha=0.5)
)+
theme(strip.background =element_blank(), strip.placement = "outside")
#2 grab the legend from a graph with the legend I want (without alpha).
auxplot <- ggplot(iris, aes(x=Petal.Length, y=Petal.Width,
color=Species,
shape=Species,
fill=Species)) + geom_point()
mylegend <- grab_legend(auxplot)
##### plot legend with plot
grid.newpage()
grid.draw(plotwithoutlegend)
vp = viewport(x=.9, y=.75, width=.35, height=.3) ## control legend position
pushViewport(vp)
grid.draw(mylegend)
upViewport()