Function scatterplot

docs/tests/v2/es6/js/sanddance.js:151926–152012

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
const scatterplot = context => {
  const {
    specColumns,
    insight,
    specViewOptions
  } = context;
  const errors = [];
  if (!specColumns.x) errors.push('Must set a field for x axis');
  if (!specColumns.y) errors.push('Must set a field for y axis');
  (0, _facet.checkForFacetErrors)(insight.facets, errors);
  const specCapabilities = {
    roles: [{
      role: 'x',
      axisSelection: specColumns.x && specColumns.x.quantitative ? 'range' : 'exact'
    }, {
      role: 'y',
      axisSelection: specColumns.y && specColumns.y.quantitative ? 'range' : 'exact'
    }, {
      role: 'z',
      allowNone: true
    }, {
      role: 'color',
      allowNone: true
    }, {
      role: 'sort',
      allowNone: true
    }, {
      role: 'facet',
      allowNone: true
    }],
    signals: [_constants.SignalNames.PointSize]
  };

  if (errors.length) {
    return {
      errors,
      specCapabilities,
      vegaSpec: null
    };
  }

  let axes;

  if (!insight.hideAxes) {
    axes = (0, _axes.default)(context);
  }

  let marks = (0, _marks.default)(context);

  if (specColumns.facet) {
    marks = (0, _facet.facetMarks)(specViewOptions, marks[0].from.data, marks, axes);
    axes = [];
  }

  const size = specColumns.facet ? (0, _facet.facetSize)(context) : insight.size;
  var vegaSpec = {
    $schema: 'https://vega.github.io/schema/vega/v3.json',
    height: size.height,