R - 在Shiny应用程序的单个页面上渲染多个图 [英] R - Render multiple plots on single page of Shiny app

问题描述

我试图在闪亮的应用中排列多个图表。

I am trying to arrange multiple charts on shiny app. I am trying to plot 2 pie charts and a ggplot2 chart.

require(ggplot2)
require(gridExtra)

par(mfrow = c(2,2))    

z=data.frame(x=1:10, y=11:20)
pie(z$x,z$y)
pie(z$x,z$y)
ggplot(z, aes(x,y)) + geom_bar(stat="identity", width=.3)

我尝试过使用grid.arrange，但它只渲染ggplot图表。我尝试使用 grid.arrange 渲染这三个图，然后返回错误消息输入必须是grobs！请帮助渲染这三个单页面。

I tried with grid.arrange but it only render ggplot chart. I tried to to render these three plot using grid.arrange, then it return error message input must be grobs! Please help to render these three on single page.

推荐答案

我不确定你想要它的样子，但这里有一个例子， ：

I'm not certain what you want it to look like but here's an example how to combine your three plots:

require(ggplot2)
require(grid)
require(gridBase)

z=data.frame(x=1:10, y=11:20)

# setup everything
plot.new()
gl <- grid.layout(2,2)
vp.1 <- viewport(layout.pos.col = 1, layout.pos.row = 1)
vp.2 <- viewport(layout.pos.col = 2, layout.pos.row = 1)
vp.3 <- viewport(layout.pos.col = c(1,2), layout.pos.row = 2)
pushViewport(viewport(layout=gl))

# First plot
pushViewport(vp.1)
par(new = TRUE, fig = gridFIG(), mar=c(0,0,0,0))
pie(z$x,z$y)
popViewport()

# Second plot
pushViewport(vp.2)
par(new = TRUE, fig = gridFIG(), mar=c(0,0,0,0))
pie(z$x,z$y)
popViewport(1)

# Your ggplot
pushViewport(vp.3)
p<-ggplot(z, aes(x,y)) + geom_bar(stat="identity", width=.3)
print(p, newpage = FALSE)
popViewport(2)

注意：我不推荐使用饼图。 看到这个例子

NOTE: I do not recommend using pie charts. See this example

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