How to color the background of a cell in datatable (DT package) in R with column and row names or indices?

Question

Here is an example. I created a data frame and use that to create a datatable for visualization. As you can see, my column name and the row from the first column indicate co

Answer 1

I'm not sure to get the question, but if you want to change the background color of a cell given by its row index and its column index (that's what I understand), you can do:

changeCellColor <- function(row, col){
  c(
    "function(row, data, num, index){",
    sprintf("  if(index == %d){", row-1),
    sprintf("    $('td:eq(' + %d + ')', row)", col),
    "    .css({'background-color': 'orange'});",
    "  }",
    "}"  
  )
}
datatable(dat, 
          options = list(
            dom = "t",
            rowCallback = JS(changeCellColor(1, 2))
          )
)