可以使用以下命令輕鬆在R控制檯中打印rpart樹結果文本。如何在Rshiny中打印出rpart樹結果文本
fit <- rpart(Kyphosis ~ Age + Number + Start, data = kyphosis)
print(fit)
而且它打印出:
n= 81
node), split, n, loss, yval, (yprob) * denotes terminal node
1) root 81 17 absent (0.79.20987654) 2) Start>=8.5 62 6 absent (0.90322581 0.09677419)
4) Start>=14.5 29 0 absent (1.00000000 0.00000000) * 5) Start< 14.5 33 6 absent (0.81818182 0.18181818)
10) Age< 55 12 0 absent (1.00000000 0.00000000) * 11) Age>=55 21 6 absent (0.71428571 0.28571429)
22) Age>=111 14 2 absent (0.85714286 0.14285714) * 23) Age< 111 7 3 present (0.42857143 0.57142857) * 3) Start< 8.5 19 8 present (0.42105263 0.57894737) *
然而,這並不在Rshiny textOutput工作。
請參閱以下Rshiny代碼:
ui.r
library(shiny)
# Define UI for application that draws a histogram
shinyUI(fluidPage(
# Application title
# Show a plot of the generated distribution
mainPanel(
plotOutput("distPlot"),
textOutput("distText")
)
)
)
server.r
library(shiny)
library(rpart)
# Define server logic required to draw a histogram
shinyServer(function(input, output) {
output$distText <- renderText({
fit <- rpart(Kyphosis ~ Age + Number + Start, data = kyphosis)
print(fit)
})
})
如果我運行上面閃亮的應用程序,它提供以下錯誤:
Error in cat(list(...), file, sep, fill, labels, append) :
argument 1 (type 'list') cannot be handled by 'cat'