text: /**
  * Copyright 2012-2016, Plotly, Inc.
  * All rights reserved.
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
  
  
  'use strict';
  
  /**
   * Histogram has its own attribute, defaults and calc steps,
   * but uses bar's plot to display
   * and bar's setPositions for stacking and grouping
   */
  
  /**
   * histogram errorBarsOK is debatable, but it's put in for backward compat.
   * there are use cases for it - sqrt for a simple histogram works right now,
   * constant and % work but they're not so meaningful. I guess it could be cool
   * to allow quadrature combination of errors in summed histograms...
   */
  
  
  var Histogram = {};
  
  Histogram.attributes = require('./attributes');
  Histogram.layoutAttributes = require('../bar/layout_attributes');
  Histogram.supplyDefaults = require('./defaults');
  Histogram.supplyLayoutDefaults = require('../bar/layout_defaults');
  Histogram.calc = require('./calc');
  Histogram.setPositions = require('../bar/set_positions');
  Histogram.plot = require('../bar/plot');
  Histogram.style = require('../bar/style');
  Histogram.colorbar = require('../scatter/colorbar');
  Histogram.hoverPoints = require('../bar/hover');
  
  Histogram.moduleType = 'trace';
  Histogram.name = 'histogram';
  Histogram.basePlotModule = require('../../plots/cartesian');
  Histogram.categories = ['cartesian', 'bar', 'histogram', 'oriented', 'errorBarsOK', 'showLegend'];
  Histogram.meta = {
      description: [
          'The sample data from which statistics are computed is set in `x`',
          'for vertically spanning histograms and',
          'in `y` for horizontally spanning histograms.',
          'Binning options are set `xbins` and `ybins` respectively',
          'if no aggregation data is provided.'
      ].join(' ')
  };
  
  module.exports = Histogram;
  