我希望有一个简单的问题,可以将标记的有序列表传递到Shiny Dashboard中。我想做的是有一个函数,该函数根据已过滤的类别列出项目符号点的有序列表。
这是一个我想对名为nba_teams的数据框进行处理的简单例子。
teams conference
Bulls Eastern
Nuggets Western
Celtics Eastern
Lakers Western
现在,如果我编写此功能,它将列出各个会议的列表:
for (row in 1:nrow(nba_teams)){
teams <- nba_teams[row, "teams"]
conference <- nba_teams[row,"conference"]
if(grepl("Western",conference)){
print(tags$li(teams))
}
}
我想做的就是在选项卡框中输入以下内容:
box(
title = "Western Conference",
tags$ol(
for (row in 1:nrow(nba_teams)){
teams <- nba_teams[row, "teams"]
conference <- nba_teams[row,"conference"]
if(grepl("Western",conference)){
print(tags$li(teams))
}
})),
但是,这只是将框留为空白,并且不会为每次观察填充一个带有项目符号的框。
有什么建议吗?谢谢!
答案 0 :(得分:1)
在这种情况下,我会使用lapply
:
library(shiny)
library(shinydashboard)
nba_teams <- data.frame(team = c("Bulls", "Nuggest", "Celtics", "Lakers"),
conference = c("Eastern", "Western", "Eastern", "Western"))
ui <- dashboardPage(
dashboardHeader(),
dashboardSidebar(),
dashboardBody(
box(
title = "Western Conference",
tags$ol(
lapply(1:nrow(nba_teams), function(x) {
if (nba_teams$conference[x]=="Western") {
return(tags$li(nba_teams$team[x]))
}
})
)
)
)
)
server <- function(input, output, session) {}
shinyApp(ui, server)