add pivot operations

Webix JS
#1

what is the correct way to add or upgrade existing operation (sum,
max, min, count)
I want to display dates in the value field
is this possible?
from already thank you very much

#2

Hello,

You can add any custom operation to pivot ‘operations’ collection as well as redefine any existing one in the following way:

webix.ready(function(){
  var pivot = webix.ui({
    view:"pivot",
    structure:{
    values:[
       { name:"gdp", operation:"abssum"}
     ]
   }
  });
  pivot.operations.abssum = function(data) {
    //data - array of values which need to be processed
    var sum = 0;
    for (var i = 0; i < data.length; i++) {
       var num = window.parseFloat(data[i], 10);
       if (!window.isNaN(num))
          sum += Math.abs(num);
       }
    return sum;
 };
})

Here it’s described in the documentation: http://docs.webix.com/desktop__pivot.html#configuringpivot

As to dates, now there’s no possibility to display them in the value field.

#3

thank you very much for the information.!