[英]R: facet_wrap does not render correctly with ggplotly in Shiny app
當我在ggplotly()中為具有大量構面組的Shiny App做facet_grid時,情節變得混亂。 但是,它在Shiny外部正常工作。
我怎樣才能解決這個問題?
我懷疑它與Y比例尺有關,但找不到解決方案。
這是一個基於plotly的鑽石示例的可復制示例。
比較有光澤和非有光澤的輸出: 外部和內部的facet_grid的比較
碼
外面有光澤:
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")
閃亮應用中的相同代碼:
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:我在實際應用中需要時有意使用aes_string()而不是aes()。
首先要注意的是,問題與Shiny
無關,而與ggplotly
。 可以用以下方法復制該問題:
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)
盡管您將需要一些東西來查看其中的輸出,但可能很shiny
。
在回答您的問題時,問題似乎在於您的切面不能超過25個。 如果從rdmGroup
刪除任何單個組,則plotly
輸出可以正常工作,例如
diamonds <- subset(diamonds, rdmGroup != "Q")
要更新您的閃亮示例:
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)
提供以下輸出:
一種解決方法是簡單地擁有多個圖,將數據集分成25組。
編輯:我做了一些研究,並且當面板邊距太大而無法顯示所有圖時,圖將按預期停止顯示。 您可以通過減少panel.spacing.y
來顯示全部26條panel.spacing.y
但這僅取決於需要多少行:
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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