Question

我试图用聚合函数制作饼图。它应该显示该类别中的类别名称和产品计数。我不知道如何找到类别的产品数量。

如何找到它们？感谢。

＆＃13;

import scala.annotation.tailrec

object FuncSelectionSort {
/**
* Selection Sort - Trying Functional Style
*/
def sort(a: Array[Int]) = {

    val b: Array[Int] = new Array[Int](a.size)
    Array.copy(a, 0, b, 0, a.size)

    // Function to swap elements
    def exchange(i: Int, j: Int): Unit = {
        val k = b(i);
        b(i) = b(j);
        b(j) = k;
    }

    @tailrec
    def helper(b: Array[Int], n: Int): Array[Int] = {
        if (n == b.length-1) return b
        else {
            val head = b(n);
            val minimumInTail = b.slice(n, b.length).min;

            if (head > minimumInTail) {
                val minimumInTailIndex = b.slice(n, b.length).indexOf(minimumInTail);
                exchange(n, minimumInTailIndex + n);
            }

            helper(b, n + 1)
        }
    }
    helper(b, 0)
    }
}

＆＃13;

var dataSource = new kendo.data.DataSource({

  type: "odata",
  transport: {
    read: "//demos.telerik.com/kendo-ui/service/Northwind.svc/Categories"
  },

});


$("#chart").kendoChart({
  dataSource: dataSource,
 
  legend: {
    visible: true
  },
  seriesDefaults: {
    type: "pie"
  },

  series: [{
  
    field: "CategoryID",  //it should be product count by category
    categoryField: "CategoryName",
    explodeField: "explode",
    labels: {
      visible: true,
    }
  }],


});

＆＃13;

Answer 1

以这种方式试试，

    var dataSource = new kendo.data.DataSource({
        type: "odata",
        transport: {
            read: "//demos.telerik.com/kendo-ui/service/Northwind.svc/Categories?$expand=Products"
        },
    });


   $("#chart").kendoChart({
        dataSource: dataSource,
        legend: {
            visible: true
        },
        series: [{
            type: "pie",
            field: "Products.results.length",
            categoryField: "CategoryName",
            explodeField: "explode",
            labels: {
                visible: true,
            }
        }]
    });

Read up on odata expand并计算标量导航属性以获得更精细的

饼图的kendoui聚合函数

1 个答案: