Format number into K(thousand), M(million) in Shiny DataTables

问题

I'm looking for a straight forward way to change the formatting of numbers into K,M in shiny dataTables. Preferably with something like formatCurrency. I don't want to write k, m functions to convert number into string in order to do the formatting as it makes it difficult to sort rows by value.

回答1:

There's no built-in way to do this, but it's not too bad to write your own format function in JavaScript that doesn't break row sorting.

See Column Rendering in the DT docs for how to do this: https://rstudio.github.io/DT/options.html

And this will also help: https://datatables.net/reference/option/columns.render

Here's an example of a custom thousands formatter that rounds to 1 decimal place:

library(DT)

formatThousands <- JS(
  "function(data) {",
  "return (data / 1000).toFixed(1) + 'K'",
  "}")

datatable(datasets::rock, rownames = FALSE, options = list(
  columnDefs = list(list(
    targets = 0:1, render = formatThousands
  ))
))

来源：https://stackoverflow.com/questions/46656851/format-number-into-kthousand-mmillion-in-shiny-datatables