Excluding certain objects from JSON data in d3js

In my JSON file, I have the following data structure:

    {
 "children": [
  {
   "name": "المصاريف",
   "children": [
    {"name": "بنزين","size": 14230,"colour": "rgb(220,230,180)"},
    {"name": "تاكسي","size": 25220,"colour": "rgb(220,230,200)"},
    {"name": "شاي","size": 30523,"colour": "rgb(220,230,220)"}
   ]
  },
  {
   "name": "الدخل",
   "children": [
    {"name": "مرتب","size": 50657,"colour": "rgb(150,230,180)"},
    {"name": "ايجار","size": 24320,"colour": "rgb(150,230,200)"},
    {"name": "مصنع","size": 163460,"colour": "rgb(150,230,220)"}
   ]
  },{
   "name": "الربح","size": 168464,"colour": "rgb(180,230,220)"}
 ]
}

The issue arises from the root object not having a name. When binding the data using

  .data(partition.nodes(root))

I need to exclude the first node in my D3 chart.

In other words, any node with a null name or an empty node should be disregarded in the legend. Here is a screenshot of the problem:

Answer №1

The function partition.nodes(root) will give back an array.

You have the ability to filter out certain elements from the array based on specific characteristics of the data objects, such as whether the name is not null:

.data(partition.nodes(root).filter(function(d){return d.name;}) )
    //any nodes with no value or empty string for d.name will be excluded

However, if you want to exclude the root node specifically from a d3 partition layout node array, you can utilize the fact that the root node always appears as the first element in the array. This means it's more efficient to simply slice the array instead of performing a filter test on each element:

.data( partition.nodes(root).slice(1) );

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