我正在构建一个交互式热图Shiny
应用程序,并希望从下拉菜单中选择要排序的列(例如:在mtcars中从低到高排序"mpg"或"wt")。我正在使用d3heatmap
包实现热图,并希望使用dplyr
缩短数据帧的反应性。我在运行代码时得到以下错误:
eval中出错(替换(expr)、envir、enclos):无效的下标类型"关闭"
我还尝试使用reactiveValues
而不是reactive
,并将代码作为注释包含在内。使用reactiveValues
方法,我得到以下错误:
警告:观察者中出现未处理的错误:无效的下标类型"闭包"
如果能为热图排序工作提供任何帮助,我们将不胜感激!
app.R
library(ggplot2)
library(d3heatmap)
library(dplyr)
library(shiny)
## ui.R
ui <- fluidPage(
sidebarPanel(
h5(strong("Dendrogram:")),
checkboxInput("cluster_row", "Cluster Rows", value=FALSE),
checkboxInput("cluster_col", "Cluster Columns", value=FALSE),
selectInput("sort", "Sort By:", c(names(mtcars),"none"), selected="mpg")
),
mainPanel(
h4("Heatmap"),
d3heatmapOutput("heatmap", width = "100%", height="600px") ##
)
)
## server.R
server <- function(input, output) {
# values <- reactiveValues(df=mtcars)
#
# observe({
# if(input$sort != "none"){
# values$df <- arrange(mtcars, input$sort)
# }else{
# values$df <- mtcars
# }
# })
df_sort <- reactive({
df <- mtcars
if(input$sort != "none"){
df <- arrange(mtcars, input$sort)
}else{
df <- mtcars
}
})
output$heatmap <- renderD3heatmap({
d3heatmap(df_sort(),
colors = "Blues",
if (input$cluster_row) RowV = TRUE else FALSE,
if (input$cluster_col) ColV = TRUE else FALSE,
yaxis_font_size = "7px"
)
})
}
shinyApp(ui = ui, server = server)
input$sort
是作为字符串传递的,因此需要使用arrange_
(请参阅NSE上的渐晕)。
以下应该可以做到:
server <- function(input, output) {
df_sort <- reactive({
df <- if(input$sort=='none') mtcars else arrange_(mtcars, input$sort)
})
output$heatmap <- renderD3heatmap({
d3heatmap(
df_sort(),
colors = "Blues",
RowV <- if(input$cluster_row) TRUE else FALSE,
ColV <- if(input$cluster_col) TRUE else FALSE,
yaxis_font_size = "7px"
)
})
}
ui <- fluidPage(
sidebarPanel(
h5(strong("Dendrogram:")),
checkboxInput("cluster_row", "Cluster Rows", value=FALSE),
checkboxInput("cluster_col", "Cluster Columns", value=FALSE),
selectInput("sort", "Sort By:", c(names(mtcars),"none"), selected="mpg")
),
mainPanel(
h4("Heatmap"),
d3heatmapOutput("heatmap", width = "100%", height="600px") ##
)
)