[英]Rstudio shiny not able to use ggvis
我運行了一個RStudio Shiny服務器,我從https://github.com/rstudio/ggvis安裝了ggvis,但我無法重現服務器中的任何演示示例。
當我使用服務器(3.1.0)中安裝的相同版本運行R時,我可以執行以下操作:
> library("shiny")
> library("ggvis")
The ggvis API is currently rapidly evolving. We strongly recommend that you do not rely on this for production, but feel free to explore. If you encounter a clear bug, please file a minimal reproducible example at https://github.com/rstudio/ggvis/issues. For questions and other discussion, please use https://groups.google.com/group/ggvis.
Attaching package: "ggvis"
The following object is masked from "package:stats":
filter
> ggvis::ggvisOutput
function (plot_id = rand_id("plot_id"))
{
ggvisOutputElements(plot_id, spec = NULL, shiny = TRUE)
}
<environment: namespace:ggvis>
但是,當我在其中一個演示文件夾中嘗試示例時:
# ui.R
shinyUI(pageWithSidebar(
div(),
sidebarPanel(
sliderInput("n", "Number of points", min = 1, max = nrow(mtcars),
value = 10, step = 1),
uiOutput("plot_ui")
),
mainPanel(
ggvisOutput("plot"),
tableOutput("mtc_table")
)
))
# server.R
library("ggvis", lib.loc="/opt/R/R-3.1.0/lib64/R/library")))
shinyServer(function(input, output, session) {
# A reactive subset of mtcars
mtc <- reactive({ mtcars[1:input$n, ] })
# A simple visualisation. In shiny apps, need to register observers
# and tell shiny where to put the controls
mtc %>%
ggvis(~wt, ~mpg) %>%
layer_points() %>%
bind_shiny("plot", "plot_ui")
output$mtc_table <- renderTable({
mtc()[, c("wt", "mpg")]
})
})
我明白了:
ERROR: could not find function "ggvisOutput"
使用ggvisOutput
語句注釋掉該行然后正常呈現頁面但沒有繪圖。
有任何想法嗎?
你的ui.R
文件中的源ggvis
(例如http://128.199.255.233:3838/userApps/john/ggvistest/
):
library("ggvis")
shinyUI(pageWithSidebar(
div(),
sidebarPanel(
sliderInput("n", "Number of points", min = 1, max = nrow(mtcars),
value = 10, step = 1),
uiOutput("plot_ui")
),
mainPanel(
ggvisOutput("plot"),
tableOutput("mtc_table")
)
))
library(shiny)
library(ggvis)
shinyServer(function(input, output, session) {
# A reactive subset of mtcars
mtc <- reactive({ mtcars[1:input$n, ] })
# A simple visualisation. In shiny apps, need to register observers
# and tell shiny where to put the controls
mtc %>%
ggvis(~wt, ~mpg) %>%
layer_points() %>%
bind_shiny("plot", "plot_ui")
output$mtc_table <- renderTable({
mtc()[, c("wt", "mpg")]
})
})
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