如何在同一图形rCharts High Charts上放置多个图表

Using rCharts wrapper for High Charts, how would I plot different charts onto the same graph? In other words, I would essentially want one chart, let's call it h1, to be its own chart with its own x-axis and y-axis and another chart h2 to have its own x-axis and y-axis, but I would like to be able to return some final chart, say h3, that stacks h1 and h2 into one object that I can return with my plotting function. Is this possible? I don't have an example because I don't have an understanding of how to really approach this problem right now. Thank you.Using rCharts wrapper for High Charts, how woul