[英]I can't get ggvis scales to remain fixed with reactive input
我正在嘗試創建一個閃亮的應用程序,允許用戶選擇某些組來繪制ggvis圖。 我遇到的問題是,如果我將反應數據映射到點的屬性(如點填充,形狀等),則每次用戶更新組時,比例都會重置。 因此,組標識到填充顏色的映射不會保持不變。 我嘗試通過硬編碼組ID來修復此問題以填充反應元素中的顏色,但是當應用程序開始加載時,我開始難以解釋錯誤。
這是我第一次嘗試的代碼:
#ui.R
library(shiny)
library(ggvis)
shinyUI(fluidPage(
# Application title
titlePanel("Old Faithful Geyser Data"),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
checkboxGroupInput("gear", label = "Gears", choices = c("3","4","5"))
),
# Show a plot of the generated distribution
mainPanel(
uiOutput("ggvis_ui"),
ggvisOutput("ggvis"),
textOutput("jawn"))
)
))
#server.R
library(shiny)
library(ggvis)
library(dplyr)
shinyServer(function(input, output) {
selected <- reactive(input$gear)
selectedData <- reactive({
mtcars %>%
filter(gear %in% selected())%>%
mutate(gear = as.character(gear))
})
colorRange <- reactive({
c(`3` = "red", `4` = "blue", `5` = "green")[sort(selected())]
})
output$jawn <- renderText(colorRange())
mtcars%>%
ggvis(~wt, ~mpg)%>%
layer_points()%>%
layer_points(data = selectedData, fill = ~gear)%>%
scale_ordinal("fill", range = colorRange) %>%
bind_shiny("ggvis", "ggvis_ui")
})
當我運行這個時,我得到錯誤:
Error : x is not a numeric or integer vector
我還有一個github存儲庫,其中一個我的其他嘗試解決方案,它得到一個不同的錯誤,代碼有效,但有重映射問題: https : //github.com/JoFrhwld/ggvis_scales
編輯:我應該說這是ggvis v0.3,dplyr v0.3和閃亮的v0.10
答案,感謝ggvis google小組
因此,新的server.R代碼
# server.R
library(shiny)
library(ggvis)
library(dplyr)
shinyServer(function(input, output) {
selected <- reactive(input$gear)
selectedData <- reactive({
mtcars %>%
filter(gear %in% selected())%>%
mutate(gear = as.character(gear))%>%
group_by(gear)
})
fill_domain = c("3","4","5")
fill_range = c("red","blue","green")
mtcars%>%
ggvis(~wt, ~mpg)%>%
layer_points()%>%
layer_points(data = selectedData, fill = ~gear)%>%
scale_ordinal("fill", range = fill_range, domain = fill_domain)%>%
bind_shiny("ggvis", "ggvis_ui")
})
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