请有关发光代码的助手。我想通过将数据帧输入分成列向量进行运算来处理数据帧输入,但是我一直收到此错误
Warning in <reactive>(...): NAs introduced by coercion
代码如下
library(shiny)
ui <- fluidPage(
# dataset
data <- data.frame(e1 = c(3, 7, 2, 14, 66),
e2 = c(2, 16, 15, 66, 30),
n1 = c(18, 25, 45, 62, 81),
n2= c(20, 30, 79, 64, 89))
# Application title
titlePanel("Demo"),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
# Input: Upload file
fileInput(inputId = 'file', label = 'upload the file')
),
# Display Output
mainPanel(
uiOutput("final")
)
)
)
# Define server logic required to draw a histogram
server <- function(input, output) {
# separating the dataframe into 4 column vectors
e1 <- reactive(as.numeric(input$file[,1]))
e2 <- reactive(as.numeric(input$file[,2]))
n1 <- reactive(as.numeric(input$file[,3]))
n2 <- reactive(as.numeric(input$file[,4]))
# File Upload function
data <- reactive({
file1 <- input$file
if(is.null(file1)){return()}
read.table(file = file1$datapath, sep = ',', header = TRUE)
})
output$result <- renderUI({
y <- (e1()/n1()) - (e2()/n2())
lg_y <- log(y)
v2 <- ((n1() - e1())/e1() * n1()) + ((n2() - e2())/e2() * n2())
w <- 1/v2
w1 <- sum(w)
w2 <- sum(w^2)
c <- w1 - (w2/w1)
s2 <- w * lg_y
ybar <- sum(s2)/sum(w)
Q <- sum(w*((lg_y - ybar)^{2}))# Cochrane homogeneity test statistic
Q.pval <- reactive(pchisq(Q, k() - 1,lower.tail = FALSE))
Isqd <- max(100*((Q-(k()-1))/Q),0)
})
}
# Run the application
shinyApp(ui = ui, server = server)
我在该论坛上搜索了几乎所有问题,但没有看到问题的答案。请期待您的帮助
答案 0 :(得分:0)
由于您未定义函数k()
,因此仍然无法运行上面的代码。同样,仅供参考,您的renderUI
设置为"result"
,而您的uiOutput设置为"final"
。
您会收到警告Warning in <reactive>(...): NAs introduced by coercion
,因为您的真实数据集中可能包含非数字。您上面提供的数据集没有任何问题。
有两种前进方式:
1)在处理数据之前,编写一个删除所有非数字的函数。有关一些示例,请参见here。
2)仅保留警告,毕竟这是一个警告,因此它不会阻止您的代码运行。当前,它将您的非数字变成NA
3)使用suppressWarnings()
,但通常不建议这样做。
我确实有建议清理您的代码:
# File Upload function
data <- reactive({
file1 <- input$file
if(is.null(file1)){return()}
read.table(file = file1$datapath, sep = ',', header = TRUE, stringsAsFactors = FALSE)
})
# separating the dataframe into 4 column vectors
e1 <- reactive(as.numeric(data()[,1]))
e2 <- reactive(as.numeric(data()[,2]))
n1 <- reactive(as.numeric(data()[,3]))
n2 <- reactive(as.numeric(data()[,4]))