Learning D3

d3-array

array methods built-in to JavaScript

• array.pop => popped element

• array.push => array.length

• array.reverse => change the array

• array.shift => shifted element

• array.unshift => array.length

• array.sort => change the array

• array.splice => change the array

• array.concat => new Array

• array.join => new String

• array.slice => new Array

• array.indexOf => number

• array.lastIndexOf => number

• array.fitler => new Array

• array.forEach => undefined

• array.every => boolean

• array.map => new Array

• array.some => boolean

• array.reduce =>

• array.reduceRight =>

yarn add d3-array

Statistics

• d3.min(array[, accessor])

  • Mininum value using natural order
  • Return undefined if the array is empty
  • An optional accessor function may be specified, which is equivalent to calling array.map(accessor) before computing the minumum value.

• d3.max(array[, accessor])

  • Return maximum value
  • Return undefined. if the array is empty

• d3.extent(array[, accessor])

  • Return minumum and maximum value in the given array.
  • Return [undefined, undefined] if the array is empty

• d3.sum(array[, accessor])

  • Return the sum of the given array of numbers.
  • Return 0 if the array is empty.
  • ignores undefined and NaN values.

• d3.mean(array[, accessor])

  • Return the mean of the given array of numbers.
  • Return undefined if the array is empty.
  • Ignore undefined and NaN.

• d3.median(array[, accessor]) -

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