library(shiny)
library(DT)
library(dplyr)

ui <- basicPage(

  DT::dataTableOutput('x1')
)

server <- function(input, output, session) {
  # create a character vector of shiny inputs
  shinyInput = function(FUN, len, id, ...) {
    inputs = character(len)
    for (i in seq_len(len)) {
      inputs[i] = as.character(FUN(paste0(id, i), label = NULL, ...))
    }
    inputs
  }

  # obtain the values of inputs
  shinyValue = function(id, len) {
    unlist(lapply(seq_len(len), function(i) {
      value = input[[paste0(id, i)]]
      if (is.null(value)) 1 else value
    }))
  }

  # a sample data frame
  DF <- reactive(
    iris <- iris %>%
      mutate(
        adjust = shinyInput(numericInput, nrow(iris), 'adj', value = 1),
        Petal_Area = Petal.Length*Petal.Width/shinyValue('adj', nrow(iris))
      )
  )

  # render the table containing shiny inputs
  output$x1 = DT::renderDataTable(

    # use slider to control number of rows shown in table
    DF(), server = FALSE, escape = FALSE, options = list(
      preDrawCallback = JS('function() {
                           Shiny.unbindAll(this.api().table().node()); }'),
      drawCallback = JS('function() {
                        Shiny.bindAll(this.api().table().node()); } ')
      )
      )
}

shinyApp(ui, server)