[英]R: facet_wrap does not render correctly with ggplotly in Shiny app
当我在ggplotly()中为具有大量构面组的Shiny App做facet_grid时,情节变得混乱。 但是,它在Shiny外部正常工作。
我怎样才能解决这个问题?
我怀疑它与Y比例尺有关,但找不到解决方案。
这是一个基于plotly的钻石示例的可复制示例。
比较有光泽和非有光泽的输出: 外部和内部的facet_grid的比较
码
外面有光泽:
library(ggplot2)
data(diamonds, package = "ggplot2")
# new faceting group
diamonds$rdmGroup <- as.factor(sample(LETTERS, dim(diamonds)[1], replace=TRUE))
# subset of diamonds
diamonds <- diamonds[sample(nrow(diamonds), 1000),]
ggplot(diamonds , aes_string(x = diamonds$x, y = diamonds$y, color = diamonds$x)) +
geom_point() + facet_grid(rdmGroup~.) +
guides(color=FALSE) +
labs(x = "X", y="Y")
闪亮应用中的相同代码:
library(shiny)
library(plotly)
library(ggplot2)
data(diamonds, package = "ggplot2")
# new faceting group
diamonds$rdmGroup <- as.factor(sample(LETTERS, dim(diamonds)[1], replace=TRUE))
# subset of diamonds
diamonds <- diamonds[sample(nrow(diamonds), 1000),]
ui <- fluidPage(
headerPanel("Diamonds Explorer"),
sidebarPanel(
sliderInput('plotHeight', 'Height of plot (in pixels)',
min = 100, max = 2000, value = 1000)
),
mainPanel(
plotlyOutput('trendPlot')
)
)
server <- function(input, output) {
output$trendPlot <- renderPlotly({
p <- ggplot(diamonds, aes_string(x = diamonds$x, y =diamonds$y, color = diamonds$x)) +
geom_point()+ facet_grid(rdmGroup~., scales = "free_y") +
labs(x = "X", y="Y")
ggplotly(p) %>%
layout(height = input$plotHeight, autosize=TRUE)
})
}
shinyApp(ui, server)
PS:我在实际应用中需要时有意使用aes_string()而不是aes()。
首先要注意的是,问题与Shiny
无关,而与ggplotly
。 可以用以下方法复制该问题:
library(ggplot2)
library(plotly)
data(diamonds, package = "ggplot2")
# new faceting group
diamonds$rdmGroup <- as.factor(sample(LETTERS, dim(diamonds)[1], replace=TRUE))
# subset of diamonds
diamonds <- diamonds[sample(nrow(diamonds), 1000),]
p <- ggplot(diamonds , aes_string(x = diamonds$x, y = diamonds$y, color = diamonds$x)) +
geom_point() + facet_grid(rdmGroup~.)
ggplotly(p)
尽管您将需要一些东西来查看其中的输出,但可能很shiny
。
在回答您的问题时,问题似乎在于您的切面不能超过25个。 如果从rdmGroup
删除任何单个组,则plotly
输出可以正常工作,例如
diamonds <- subset(diamonds, rdmGroup != "Q")
要更新您的闪亮示例:
library(shiny)
library(plotly)
library(ggplot2)
data(diamonds, package = "ggplot2")
# new faceting group
diamonds$rdmGroup <- as.factor(sample(LETTERS, dim(diamonds)[1], replace=TRUE))
# subset of diamonds
diamonds <- diamonds[sample(nrow(diamonds), 1000),]
diamonds <- subset(diamonds, rdmGroup != "Q")
ui <- fluidPage(
headerPanel("Diamonds Explorer"),
sidebarPanel(
sliderInput('plotHeight', 'Height of plot (in pixels)',
min = 100, max = 2000, value = 1000)
),
mainPanel(
plotlyOutput('trendPlot')
)
)
server <- function(input, output) {
output$trendPlot <- renderPlotly({
p <- ggplot(diamonds, aes_string(x = diamonds$x, y =diamonds$y, color = diamonds$x)) +
geom_point()+ facet_grid(rdmGroup~., scales = "free_y") +
labs(x = "X", y="Y")
ggplotly(p) %>%
layout(height = input$plotHeight, autosize=TRUE)
})
}
shinyApp(ui, server)
提供以下输出:
一种解决方法是简单地拥有多个图,将数据集分成25组。
编辑:我做了一些研究,并且当面板边距太大而无法显示所有图时,图将按预期停止显示。 您可以通过减少panel.spacing.y
来显示全部26条panel.spacing.y
但这仅取决于需要多少行:
p <- ggplot(diamonds, aes_string(x = diamonds$x, y =diamonds$y, color = diamonds$x)) +
geom_point()+ facet_grid(rdmGroup~., scales = "free_y") +
labs(x = "X", y="Y") + theme(panel.spacing.y = unit(0.2, "lines"))
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