Word Cloud

Word Cloud Type

In the chart object, add a type attribute. Set the value to wordcloud. A basic word cloud with text data looks like this:

{
  type: 'wordcloud'
}

Data

There are two ways to provide the data for your word cloud: the text attribute and the words array.

text Attribute

You can provide the desired text, and ZingChart will aggregate the data for you. Create an options object, and add a text attribute. Provide your text data as a string value.

options: {
  text: "text data..."
}

words Array

Alternatively, you can provide each word with an associated word count or weight (how little or often you want the specific word to appear). Create an options object, and add a words array. Inside the array, create an object for each word.

Inside each object, add a text attribute. Provide your word as a string value. Next, add a count attribute. Provide the word count as a number value.

options: {
  words: [
    {
      text: "word1",
      count: val1
    },
    {
      text: "word2",
      count: val2
    },
    ...
    {
      text: "wordN",
      count: valN
    }
  ]
}

Chart-Specific Properties

You can customize how the word cloud is filtered, positioned, and styled within the options object.

Filtering

Token

By default, ZingChart analyzes your data string per word. To change the analysis to characters, use the token attribute and set the value to word (default) or character.

{
    options: {
    token: 'character' // 'word'
  }
}

Minimum Length

Use the min-length attribute to filter out words below a specified minimum length. Provide a number value.

{
    options: {
    minLength: 4
  }
}

Ignore Words

Use the ignore array to define words to be excluded from the word cloud. Provide the values as strings inside the array.

{
    options: {
    ignore: ['establish', 'this']
  }
}

Maximum Items

Use the max-items attribute to set a limit to the number of words displayed in the word cloud. Provide a number value.

{
    options: {
    maxItems: 10
  }
}

Normalize

Use the normalize attribute to ignore letter casing when counting words. For example, in the demo below "Young" and "young" would be counted as the same word.

{
  options: {
    normalize: true
  }
}

Positioning

Aspect

Use the aspect attribute to change the layout of the word cloud. Enter a value of spiral (default), flow-center, or flow-top.

{
    options: {
    aspect: 'flow-center' // 'spiral' | 'flow-top'
  }
}

Rotate

Use the rotate attribute to rotate every other word in the cloud by 90 degrees. Provide a boolean value: true or false (default).

{
    options: {
    rotate: true // false
  }
}

Step Angle and Radius

Use the step-angle and step-radius attributes to set the step angle and/or radius. Provide number values.

{
  options: {
    stepAngle: 30,
    stepRadius: 30,
  }
}

Font Size

Use the max-font-size and min-font-size to define the maximum and/or maximum font sizes of the words displayed in the word cloud. Provide number or pixel values.

{
  options: {
    maxFontSize: 50,
    minFontSize: 10
  }
}

Font Color

Use the color-type attribute to select the type of color scheme to be applied to the word cloud: random (default), color, or palette.

Color

When color-type is set to color, use the color attribute to set a single font color.

{
  options: {
    colorType: 'color',
    color: '#4CAF50'
  }
}

Palette

When color-type is set to palette, use the palette array to specify the font color palette. Provide the color values as strings inside the array.

{
  options: {
    colorType: 'palette',
    palette: ['#2196F3', '#3F51B5', '#42A5F5', '#5C6BC0', '#64B5F6', '#7986CB', '#90CAF9', '#9FA8DA', '#BBDEFB', '#C5CAE9']
  }
}

Tokens

Word clouds use the following tokens:

Further Customization

Use the style object to further style your word cloud. You can add backgrounds and borders, as well as turn on the hover state and tooltip features.

Interactions

To enable some interactivity on click of a word in the wordcloud, use the label_click event.