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  2. Examples

Filter edges ​

transformationsfilteringdata-cleaning

This example shows how to filter edges in the graph. It uses the addEdgeFilter API to filter out companies which did not raise more than 50 million USD.

ts
import Ogma, { Edge, EdgeFilter } from '@linkurious/ogma';

interface ND {}
interface ED {
  raised_amount_usd: number;
}

const ogma = new Ogma<ND, ED>({
  container: 'graph-container'
});

const graph = await Ogma.parse.jsonFromUrl<ND, ED>('solarCity.json');
await ogma.setGraph(graph);
await ogma.view.locateGraph();
let filter: EdgeFilter<ND, ED>;

// Show edges with raised amount >= $50 millions
// and hide all other edges, including
// those which have not the raised_amount_usd property.
setTimeout(() => {
  filter = ogma.transformations.addEdgeFilter(e => {
    return e.getData('properties.raised_amount_usd') > 50000000;
  });

  filter.whenApplied().then(() => console.log('Filter done!'));
}, 1500);

// Remove the previously created filter
// filter.destroy();

(
  document.getElementById('toggle-filter') as HTMLButtonElement
).addEventListener('click', evt => {
  evt.preventDefault();
  ogma.transformations.getEdgeFilters().forEach(filter => filter.toggle());
});
html
<!doctype html>
<html>
  <head>
    <meta charset="utf-8" />
    <link
      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/css/solid.min.css"
      rel="stylesheet"
    />

    <link type="text/css" rel="stylesheet" href="styles.css" />
  </head>

  <body>
    <div id="graph-container"></div>
    <!-- we force the loading of the font awesome -->
    <i class="fa fa-camera-retro fa-1x" style="color: rgba(0, 0, 0, 0)"></i>
    <button id="toggle-filter">Toggle filter</button>
    <script type="module" src="index.ts"></script>
  </body>
</html>
css
#graph-container {
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  position: absolute;
  margin: 0;
  overflow: hidden;
}

#toggle-filter {
  border-radius: 4px;
  padding: 5px;
  background-color: #fff;
  border: 1px solid #ccc;
  position: absolute;
  top: 2em;
  right: 2em;
}
json
{
  "nodes": [
    {
      "id": 8666,
      "data": {
        "properties": {
          "name": "Elon Musk",
          "permalink": "/person/elon-musk",
          "url": "http://www.crunchbase.com/person/elon-musk",
          "picture": "img/musk.jpg"
        },
        "categories": [
          "INVESTOR"
        ]
      },
      "attributes": {
        "x": 25.858288814166933,
        "y": -7.103984513542148,
        "text": "Elon Musk",
        "radius": 3,
        "icon": {
          "font": "Font Awesome 5 Free",
          "content": "",
          "color": "#fff",
          "style": "bold"
        }
      }
    },
    {
      "id": 6870,
      "data": {
        "properties": {
          "name": "SolarCity",
          "permalink": "/organization/solarcity",
          "founded_at": "01/01/2006",
          "first_funding_at": "15/09/2006",
          "market": " Construction ",
          "founded_quarter": "2006-Q1",
          "founded_year": 2006,
          "state": "CA",
          "url": "http://www.crunchbase.com/organization/solarcity",
          "country": "USA",
          "homepage_url": "http://www.solarcity.com",
          "logo": "http://www.crunchbase.com/organization/solarcity/primary-image/raw",
          "founded_month": "2006-01",
          "funding_rounds": 13,
          "status": "operating",
          "funding_total": 1045040000,
          "region": "SF Bay Area",
          "category": "|Construction|Clean Technology|",
          "last_funding_at": "18/06/2013"
        },
        "categories": [
          "COMPANY",
          "INVESTOR"
        ]
      },
      "attributes": {
        "x": 0.09298533946275711,
        "y": 0.41120362281799316,
        "text": "SolarCity",
        "color": "#f35371",
        "radius": 7,
        "icon": {
          "font": "Font Awesome 5 Free",
          "content": "",
          "color": "#fff",
          "style": "bold"
        }
      }
    },
    {
      "id": 7396,
      "data": {
        "properties": {
          "name": "Tesla Motors",
          "permalink": "/organization/tesla-motors",
          "founded_at": "01/01/2003",
          "first_funding_at": "01/04/2004",
          "market": " Automotive ",
          "founded_quarter": "2003-Q1",
          "founded_year": 2003,
          "state": "CA",
          "url": "http://www.crunchbase.com/organization/tesla-motors",
          "country": "USA",
          "homepage_url": "http://www.teslamotors.com",
          "logo": "http://www.crunchbase.com/organization/tesla-motors/primary-image/raw",
          "founded_month": "2003-01",
          "funding_rounds": 11,
          "status": "operating",
          "funding_total": 823000000,
          "region": "SF Bay Area",
          "category": "|Automotive|",
          "last_funding_at": "10/10/2012"
        },
        "categories": [
          "COMPANY"
        ]
      },
      "attributes": {
        "x": 85.876122673705,
        "y": -21.207117111759345,
        "text": "Tesla Motors",
        "color": "#cd476a",
        "radius": 6,
        "icon": {
          "font": "Font Awesome 5 Free",
          "content": "",
          "color": "#fff",
          "style": "bold"
        }
      }
    },
    {
      "id": 2982,
      "data": {
        "properties": {
          "name": "First Solar",
          "permalink": "/organization/first-solar",
          "founded_at": "01/01/1999",
          "first_funding_at": "18/06/2013",
          "market": " Semiconductors ",
          "founded_quarter": "1999-Q1",
          "founded_year": 1999,
          "state": "AZ",
          "url": "http://www.crunchbase.com/organization/first-solar",
          "country": "USA",
          "homepage_url": "http://www.firstsolar.com",
          "logo": "http://www.crunchbase.com/organization/first-solar/primary-image/raw",
          "founded_month": "1999-01",
          "funding_rounds": 1,
          "status": "operating",
          "funding_total": 427700000,
          "region": "Phoenix",
          "category": "|Semiconductors|Clean Technology|",
          "last_funding_at": "18/06/2013"
        },
        "categories": [
          "COMPANY",
          "INVESTOR"
        ]
      },
      "attributes": {
        "x": -27.6874947092224,
        "y": -21.207117111759345,
        "text": "First Solar",
        "color": "#632654",
        "radius": 3,
        "icon": {
          "font": "Font Awesome 5 Free",
          "content": "",
          "color": "#fff",
          "style": "bold"
        }
      }
    },
    {
      "id": 3388,
      "data": {
        "properties": {
          "name": "Google",
          "permalink": "/organization/google",
          "founded_at": "07/09/1998",
          "first_funding_at": "01/08/1998",
          "market": " Software ",
          "founded_quarter": "1998-Q3",
          "founded_year": 1998,
          "state": "CA",
          "url": "http://www.crunchbase.com/organization/google",
          "country": "USA",
          "homepage_url": "https://www.google.com",
          "logo": "http://www.crunchbase.com/organization/google/primary-image/raw",
          "founded_m

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