Can we draw google chart with two y-axis one with top and other with bottom, with same x-axis?
问题 I need to use google chart with two y-axis and one x-axis, like (https://en.wikipedia.org/wiki/Spirometry#/media/File:Flow-volume-loop.svg). Does google chart support this type of graph? 回答1: to create a graph as referenced by the link use a single y-axis, with negative values for the bottom portion then use object notation to set both the value ( v: ) and the formatted value ( f: ) {v: -8, f: '8'} then use the same notation for the y-axis tick marks ( ticks: ) the chart will display the