文本在 R Shiny 应用程序中未正确显示（虽然没有显示代码错误，但它没有按照我写的操作）

问：

我正在构建一个简单的收入搜索工具，个人可以在其中输入他们的职位、月工资和城市，作为输出，他们可以了解他们的工资与控制其职位的地理区域内其他人的工资中位数相比如何。 打印数据

dput(df[1:10,c(1,2,3,4,5,6)]) 

输出：

structure(list(grp = c("Accountant", "Accountant", "Accountant", "Accountant", "Accountant", "Accountant", "Accountant", "Accountant", "Accountant", "Accountant"), monthly_income = c(8000, 2500, 8500, 4500, 35000, 5500, 10000, 7000, 12000, 4000), yrs_experience = c(5, NA, NA, NA, 5, NA, 0, 3, 3, NA), location = c("Portland", "Portland", "Seattle", "Portland", "Seattle", "Seattle", "Portland", "Portland", "Portland", "Seattle"), qualifications = c("no_qual_preference", "no_qual_preference", "no_qual_preference", "no_qual_preference", "BA", "no_qual_preference", "BA", "no_qual_preference", "BA", "no_qual_preference"), gender_preferences = c("no_gender_preference", "female", "female", "no_gender_preference", "no_gender_preference", "no_gender_preference", "no_gender_preference", "no_gender_preference", "no_gender_preference", "no_gender_preference")), row.names = c(NA, -10L), class = c("tbl_df", "tbl", "data.frame")) 

这是当前的代码，我已经对其进行了编辑，以纳入下面的有用建议，它运行良好，没有错误，但它没有显示我想为每个职位看到的文本。

library(shiny)
# library(shinydashboard)
# library(shinyWidgets)
#library(readxl)


ui <- fluidPage(sidebarLayout(
  sidebarPanel(
    #textInput("grp", "Occupation"), # dropdown menu for job titles
    selectizeInput(
      "grp",
      "Occupation",
      sort(salary_test_data$grp), 
      choices = append("", sort(unique(
        salary_test_data$grp
      ))),
      selected = "",
      multiple = F
    ),
    #choices = sort(unique(salary_test_data$grp)),
    selectizeInput("qualifications",
                   "Qualifications",
                   choices = append("", sort(
                     unique(salary_test_data$qualifications)
                   ))),
    verbatimTextOutput("comparison_results"),
    sliderInput(
       "yrs_experience",
      "Years of Experience",
       min = 0,
       max = 9,
       value = 0,
       post = " Year(s)"
     ),
    selectizeInput("location",
                   "City",
                   choices = append("", sort(
                     unique(salary_test_data$location)
                   ))),
    numericInput("monthly_income", "Monthly Pay", value = 0),
    actionButton("compare_btn", "Compare Salary")
  ),

mainPanel(plotOutput("salary_plot")
)
))


server <- function(input, output) {
  comparison_results <-
    eventReactive(input$compare_btn, {
      user_Occupation <- input$grp
      user_experience <- input$yrs_experience
      user_monthly_pay <- input$monthly_income
      user_location <- input$location
      user_qualification <- input$qualifications
      
      filtered_data <- salary_test_data[salary_test_data$grp == user_Occupation &
                                          salary_test_data$location == user_location &
                                          salary_test_data$qualifications == user_qualification &
                                          salary_test_data$yrs_experience == user_experience, ]
      
      if (nrow(filtered_data) > 0) {
        if (user_monthly_pay >= median(filtered_data$monthly_income)) {
          "Your monthly salary is above the median income of workers employed in your profession,
        who share your qualifications, & city"  
        } else {
          "Your monthly salary is below the median income of workers employed in your profession,
        who share your qualifications, & city"
        }
      } else {
        "No data found for the given job title and/or city"
      }
    })
  
  output$comparison_results <- renderText({
    comparison_results()
  })
  
}