GAS Column Chart from spreadsheet data

Question

On this link, a chart is prepared in GAS with hard-coded data and they have mentioned that you can get data from SpreadsheetApp.

Please can someone assist me - how to build datatable (columns, rows) in GAS Charts from spreadsheet.

I tried the following but was unsuccessful

var ss = SpreadsheetApp.openById("myid");
var datatable = ss.getSheetByName("Chart sheet").getRange("A1:H4").getValues();

var chart = Charts.newColumnChart()      
  .setDataTable(dataTable)      
  .setRange(0, 40)
  .setTitle('Chart')
  .setLegendPosition(Charts.Position.BOTTOM)
  .setDimensions(600, 300)
  .build();

I have used the code as doGet function, the output returns the following error:-

Cannot call overloaded constructor setDataTable with parameters (object) because there is more than one matching constructor signature: interface (class) setDataTable(DataTableBuilder) interface (class) setDataTable(DataTableSource)

Answer 1

In your case the only thing that is wrong is that you are calling the getValues after getting the range (Line 2). To fix it just remove the getValues(). See the code fixed bellow:

var ss = SpreadsheetApp.openById("myid");
var datatable = ss.getSheetByName("Chart sheet").getRange("A1:H4");

var chart = Charts.newColumnChart()      
  .setDataTable(dataTable)      
  .setRange(0, 40)
  .setTitle('Chart')
  .setLegendPosition(Charts.Position.BOTTOM)
  .setDimensions(600, 300)
  .build();

The API can be found here.