src/charts/tooltip.js
/**
         * This function creates the graph using the selection as container
         * @param {D3Selection} _selection A d3 selection that represents
         *                                  the container(s) where the chart(s) will be rendered
         * @param {Object} _data The data to attach and generate the chart
         */
This function creates the graph using the selection as container
@param {D3Selection} _selection A d3 selection that represents
the container(s) where the chart(s) will be rendered
@param {Object} _data The data to attach and generate the chart
This function creates the graph using the selection as container @param { D3Selection } _selection A d3 selection that represents the container ( s ) where the chart ( s ) will be rendered @param { Object } _data The data to attach and generate the chart
function exports(_selection) {
            _selection.each(function(_data){
                chartWidth = width - margin.left - margin.right;
                chartHeight = height - margin.top - margin.bottom;
                data = _data;
                buildSVG(this);
            });
        }
function exports ( _selection ) { _selection . each ( function ( _data ) { chartWidth = width - margin . left - margin . right ; chartHeight = height - margin . top - margin . bottom ; data = _data ; buildSVG ( this ) ; } ) ; }
This function creates the graph using the selection as container
 @param {D3Selection} _selection A d3 selection that represents
                                  the container(s) where the chart(s) will be rendered
 @param {Object} _data The data to attach and generate the chart
This function creates the graph using the selection as container @param { D3Selection } _selection A d3 selection that represents the container ( s ) where the chart ( s ) will be rendered @param { Object } _data The data to attach and generate the chart