R Shiny set DataTable column width

Question

I am trying to set the width of columns in a DataTable rendered in Shiny and am not able to implement it using the aoColumnDefs options. Has anyone tried this before ? My table has 1 text followed by 3 numeric columns. The numeric columns need to be narrower and the 1st column (text) wider.

output$result <- renderDataTable({
z <- as(dataInput(), "data.frame")
setnames(z, c("Rules", "Support", "Confidence", "StatDep"))
z
}, options = list(aLengthMenu = c(5, 30, 50), iDisplayLength = 5, bSortClasses = TRUE,
              aoColumnDefs = list(sWidth = "50px", aTargets = list(1))))

Thanks,

• Raj.

** Update ** This seems to be working, but there might be other options to do this as well.

output$result <- renderDataTable({
z <- as(dataInput(), "data.frame")
setnames(z, c("Rules", "Support", "Confidence", "StatDep"))
z
}, options = list(aLengthMenu = c(5, 30, 50), iDisplayLength = 5, bSortClasses = TRUE,
              bAutoWidth = FALSE,
              aoColumn = list(list(sWidth = "150px", sWidth = "30px",
                                       sWidth = "30px", sWidth = "30px"))
                                  ))

Answer 1

Try this

#OUTPUT - dtdata
output$table <- DT::renderDataTable({
  data.frame(a=c(1,2,3,4,5),b=c("A","B","C","D","E"))
},
options = list(
  autoWidth = TRUE,
  columnDefs = list(list(width = '200px', targets = "_all"))
))

Sets the width of all columns to 200px.

To set width of selected columns, change targetsto a number or vector.

targets = c(1,3)

Answer 2

By the way, in case you're like me and never used DataTables before version 1.10 came out -- The examples above confused me at first, because they use the notation that was used in version 1.9 but 1.10 introduces new notation: http://datatables.net/upgrade/1.10-convert

I've been using the new syntax, i.e.,

columnDefs instead of aoColumnDefs http://datatables.net/reference/option/columnDefs

width instead of sWidth http://datatables.net/reference/option/columns.width etc.